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People in the world’s ‘blue zones’ live longer – their diet could hold the key to why

<p><em><a href="https://theconversation.com/profiles/justin-roberts-1176632">Justin Roberts</a>, <a href="https://theconversation.com/institutions/anglia-ruskin-university-1887">Anglia Ruskin University</a>; <a href="https://theconversation.com/profiles/joseph-lillis-1505087">Joseph Lillis</a>, <a href="https://theconversation.com/institutions/anglia-ruskin-university-1887">Anglia Ruskin University</a>, and <a href="https://theconversation.com/profiles/mark-cortnage-438941">Mark Cortnage</a>, <a href="https://theconversation.com/institutions/anglia-ruskin-university-1887">Anglia Ruskin University</a></em></p> <p>Ageing is an inevitable part of life, which may explain our <a href="https://time.com/4672969/why-do-people-want-to-live-so-long/">strong fascination</a> with the <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2726954">quest for longevity</a>. The allure of <a href="https://pubmed.ncbi.nlm.nih.gov/26566891/">eternal youth</a> drives a <a href="https://www.alliedmarketresearch.com/longevity-and-anti-senescence-therapy-market-A14010">multi-billion pound industry</a> ranging from anti-ageing products, supplements and <a href="https://www.everydayhealth.com/diet-nutrition/longevity-diet">diets</a> for those hoping to extend their lifespan.</p> <p>f you look back to the turn of the 20th century, average life expectancy in the UK was around 46 years. Today, it’s closer to <a href="https://population.un.org/wpp/">82 years</a>. We are in fact <a href="https://pubmed.ncbi.nlm.nih.gov/27706136/">living longer than ever before</a>, possibly due to medical advancements and improved <a href="https://www.health.org.uk/publications/reports/mortality-and-life-expectancy-trends-in-the-uk">living and working conditions</a>.</p> <p>But living longer has also come at a price. We’re now seeing higher rates of <a href="https://www.who.int/data/gho/data/themes/mortality-and-global-health-estimates/ghe-leading-causes-of-death">chronic and degenerative diseases</a> – with heart disease consistently topping the list. So while we’re fascinated by what may help us live longer, maybe we should be more interested in being healthier for longer. Improving our “<a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4632858/">healthy life expectancy</a>” remains a global challenge.</p> <p>Interestingly, certain locations around the world have been discovered where there are a high proportion of centenarians who display remarkable physical and mental health. The <a href="https://pubmed.ncbi.nlm.nih.gov/15489066/">AKEA study of Sardinia, Italy</a>, as example, identified a “blue zone” (named because it was marked with blue pen), where there was a higher number of locals living in the central-eastern mountainous areas who had reached their 100th birthday compared with the wider Sardinian community.</p> <p>This longevity hotspot has since been expanded, and now includes several other areas around the world which also have greater numbers of longer-living, healthy people. Alongside Sardinia, these blue zones are now <a href="https://www.netflix.com/gb/title/81214929">popularly recognised</a> as: Ikaria, Greece; Okinawa, Japan; Nicoya, Costa Rica; and Loma Linda, California.</p> <p>Other than their long lifespans, people living in these zones also appear to share certain other commonalities, which centre around being <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3874460">part of a community</a>, having a <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4224996/">life purpose</a>, eating <a href="https://pubmed.ncbi.nlm.nih.gov/33514872/">nutritious, healthy foods</a>, keeping <a href="https://www.nature.com/articles/s41398-021-01735-7">stress levels</a> low and undertaking purposeful daily <a href="https://pubmed.ncbi.nlm.nih.gov/30202288/">exercise or physical tasks</a>.</p> <p>Their longevity could also relate to their <a href="https://pubmed.ncbi.nlm.nih.gov/9010380/">environment</a>, being mostly rural (or less polluted), or because of <a href="https://pubmed.ncbi.nlm.nih.gov/22253498/">specific longevity genes</a>.</p> <p>However, studies indicate genetics may only account for <a href="https://pubmed.ncbi.nlm.nih.gov/8786073">around 20-25% of longevity</a> – meaning a person’s lifespan is a complex interaction between lifestyle and genetic factors, which contribute to a long and healthy life.</p> <h2>Is the secret in our diet?</h2> <p>When it comes to diet, each blue zone has its own approach – so one specific food or nutrient does not explain the remarkable longevity observed. But interestingly, a diet rich in <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3662288">plant foods</a> (such as locally-grown vegetables, fruits and legumes) does appear to be reasonably consistent across these zones.</p> <p>For instance, the Seventh-day Adventists of Loma Linda are <a href="https://pubmed.ncbi.nlm.nih.gov/10641813/">predominately vegetarian</a>. For centenarians in Okinawa, <a href="https://pubmed.ncbi.nlm.nih.gov/20234038/">high intakes of flavonoids</a> (a chemical compound typically found in plants) from purple sweet potatoes, soy and vegetables, have been linked with <a href="https://pubmed.ncbi.nlm.nih.gov/11710359/">better cardiovascular health</a> – including lower cholesterol levels and lower incidences of stroke and heart disease.</p> <p>In Nicoya, consumption of locally produced rice and beans has been associated with <a href="https://pubmed.ncbi.nlm.nih.gov/34444746/">longer telomere length</a>. Telomeres are the structural part at the end of our chromosomes which protect our genetic material. Our telomeres get shorter each time a cell divides – so get progressively shorter as we age.</p> <p>Certain <a href="https://pubmed.ncbi.nlm.nih.gov/21102320/">lifestyle factors</a> (such as smoking and poor diet) can also shorten telomere length. It’s thought that telomere length acts as a <a href="https://pubmed.ncbi.nlm.nih.gov/31728493/">biomarker of ageing</a> – so having longer telomeres could, in part, be linked with longevity.</p> <p>But a plant-based diet isn’t the only secret. In Sardinia, for example, meat and fish is consumed in moderation in addition to locally grown vegetables and <a href="https://journalofethnicfoods.biomedcentral.com/articles/10.1186/s42779-022-00152-5">traditional foods</a> such as acorn breads, pane carasau (a sourdough flatbread), honey and soft cheeses.</p> <p>Also observed in several blue zone areas is the inclusion of <a href="https://www.jacc.org/doi/10.1016/j.jacc.2021.10.041">olive oil</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/33669360/">wine</a> (in moderation – around 1-2 glasses a day), as well as <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3830687/">tea</a>. All of these contain powerful antioxidants which may help <a href="https://ncbi.nlm.nih.gov/pmc/articles/PMC10049696/">protect our cells</a> from damage <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6273542/">as we age</a>.</p> <p>Perhaps then, it’s a combination of the protective effects of various nutrients in the diets of these centenarians, which explains their exceptional longevity.</p> <p>Another striking observation from these longevity hot spots is that meals are typically <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7232892">freshly prepared at home</a>. Traditional blue zone diets also don’t appear to contain <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6538973/">ultra-processed foods</a>, fast foods or sugary drinks which may <a href="https://pubmed.ncbi.nlm.nih.gov/32330232/">accelerate ageing</a>. So maybe it’s just as important to consider what these longer-living populations are not doing, as much as what they are doing.</p> <p>There also appears to be a pattern of eating until 80% full (in other words partial <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9036399/">caloric reduction</a>. This could be important in also supporting how our cells deal with damage as we age, which could mean a longer life.</p> <p>Many of the factors making up these blue zone diets – primarily plant-based and natural whole foods – are associated with <a href="https://pubmed.ncbi.nlm.nih.gov/35706591/">lower risk of chronic diseases</a> such as <a href="https://pubmed.ncbi.nlm.nih.gov/28728684/">heart disease</a> and <a href="https://pubmed.ncbi.nlm.nih.gov/37589638/">cancer</a>. Not only could such diets contribute to a <a href="https://pubmed.ncbi.nlm.nih.gov/37836577/">longer, healthier life</a>, but could support a more <a href="https://pubmed.ncbi.nlm.nih.gov/33397404/">diverse gut microbiome</a>, which is also associated with healthy ageing.</p> <p>Perhaps then we can learn something from these remarkable centenarians. While diet is only one part of the bigger picture when it comes to longevity, it’s an area we can do something about. In fact, it might just be at the heart of improving not only the quality of our health, but the quality of how we age.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/221463/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em><a href="https://theconversation.com/profiles/justin-roberts-1176632">Justin Roberts</a>, Professor of Nutritional Physiology, <a href="https://theconversation.com/institutions/anglia-ruskin-university-1887">Anglia Ruskin University</a>; <a href="https://theconversation.com/profiles/joseph-lillis-1505087">Joseph Lillis</a>, PhD Candidate in Nutritional Physiology, <a href="https://theconversation.com/institutions/anglia-ruskin-university-1887">Anglia Ruskin University</a>, and <a href="https://theconversation.com/profiles/mark-cortnage-438941">Mark Cortnage</a>, Senior Lecturer in Public Health and Nutrition, <a href="https://theconversation.com/institutions/anglia-ruskin-university-1887">Anglia Ruskin University</a></em></p> <p><em>Image credits: Getty Images </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/people-in-the-worlds-blue-zones-live-longer-their-diet-could-hold-the-key-to-why-221463">original article</a>.</em></p>

Food & Wine

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Debate sparked over list of top 100 cities on the planet

<p>The best 100 cities on the planet have been revealed, with one New Zealand city making the final list. </p> <p>The list was compiled by as part of an annual report by <a href="https://www.worldsbestcities.com" target="_blank" rel="noopener">Resonance Consultancy</a>, who rated major capital cities on three main factors: liveability, lovability and prosperity, with dozens of factors taken into account.</p> <p>These include educational attainment, GDP per capita, poverty rate, the number of quality restaurants, shops and nightclubs, walkability, the number of mapped bike routes, quality parks and museums, as well as ratings from TripAdvisor and Google. </p> <p>The top ten chart features four cities on the Asian continent, four in Europe and two in the U.S, while Auckland was also featured in the list, coming in at number 64.</p> <p>Taking out the number one spot this year is London, dubbed the "capital of capitals" that "reigns over all global cities" as the best metropolis in the world. </p> <p>The study proclaims it as the most liveable and the most lovable mecca, solidified by its winning culture and education attainment.</p> <p>The report concludes, "Despite crippling Covid lockdowns and economic devastation. Despite Brexit. Despite a war in Europe. The city is more indomitable and part of the global discourse than ever. From the Queen's death, to last autumn's chaotic drama at 10 Downing Street that finally calmed down with Rishi Sunak becoming prime minister, only to take heavy local election losses this spring, London is rarely quiet these days."</p> <p>Here's the full list of top 100 cities in the world.</p> <p> 1 - London, England </p> <p>2 - Paris, France</p> <p>3 - New York, USA</p> <p>4 - Tokyo, Japan</p> <p>5 - Singapore</p> <p>6 - Dubai, United Arab Emirates</p> <p>7 - San Francisco, USA</p> <p>8 - Barcelona, Spain</p> <p>9 - Amsterdam, Netherlands</p> <p>10 - Seoul, South Korea</p> <p>11 - Rome, Italy </p> <p>12 - Prague, Czechia </p> <p>13 - Madrid, Spain </p> <p>14 - Berlin, Germany</p> <p>15 - Los Angeles, USA</p> <p>16 - Chicago, USA</p> <p>17 - Washington, D.C., USA</p> <p>18 - Beijing, China </p> <p>19 - Istanbul, Turkey </p> <p>20 - Dublin, Ireland</p> <p>21 - Vienna, Austria </p> <p>22 - Milan, Italy </p> <p>23 - Toronto, Canada</p> <p>24 - Boston, USA</p> <p>25 - Abu Dhabi, United Arab Emirates </p> <p>26 - Budapest, Hungary </p> <p>27 - São Paulo, Brazil</p> <p>28 - Riyadh, Saudi Arabia</p> <p>29 - Stockholm, Sweden </p> <p>30 - Munich, Germany</p> <p>31 - Melbourne, Australia </p> <p>32 - Lisbon, Portugal </p> <p>33 - Zürich, Switzerland</p> <p>34 - Seattle, USA</p> <p>35 - Sydney, Australia </p> <p>36 - Doha, Qatar</p> <p>37 - Brussels, Belgium </p> <p>38 - San Jose, USA</p> <p>39 - Bangkok, Thailand</p> <p>40 - Warsaw, Poland </p> <p>41 - Copenhagen, Denmark </p> <p>42 - Taipei, Taiwan </p> <p>43 - Austin, USA</p> <p>44 - Oslo, Norway </p> <p>45 - Osaka, Japan </p> <p>46 - Hong Kong, China </p> <p>47 - Tel Aviv, Israel </p> <p>48 - Athens, Greece</p> <p>49 - Frankfurt, Germany</p> <p>50 - Vancouver, Canada </p> <p>51 - San Diego, USA</p> <p>52 - Orlando, USA</p> <p>53 - Helsinki, Finland </p> <p>54 - Miami, USA</p> <p>55 - Buenos Aires, Argentina </p> <p>56 - Hamburg, Germany </p> <p>57 - Brisbane, Australia </p> <p>58 - Kuwait, Kuwait</p> <p>59 - Las Vegas, USA</p> <p>60 - Montreal, Canada </p> <p>61 - Glasgow, Scotland</p> <p>62 - Shanghai, China </p> <p>63 - Rio de Janeiro, USA</p> <p>64 - Auckland, New Zealand </p> <p>65 - Atlanta, USA</p> <p>66 - Houston, USA</p> <p>67 - Busan, South Korea</p> <p>68 - Philadelphia, USA</p> <p>69 - Naples, Italy </p> <p>70 - Denver, USA</p> <p>71 - Nashville, USA</p> <p>72 - Manchester, England </p> <p>73 - Dallas, USA</p> <p>74 - Liverpool, England</p> <p>75 - Minneapolis, USA</p> <p>76 - Mexico City, Mexico</p> <p>77 - Minsk, Belarus </p> <p>78 - Lyon, France </p> <p>79 - Portland, USA</p> <p>80 - Rotterdam, Netherlands </p> <p>81 - Bogotá, Colombia</p> <p>82 - Kraków, Poland</p> <p>83 - Valencia, Spain</p> <p>84 - Santiago, Chile </p> <p>85 - Birmingham, England</p> <p>86 - New Orleans, USA</p> <p>87 - Bucharest, Romania</p> <p>88 - Leeds, England</p> <p>89 - Muscat, Oman </p> <p>90 - Ottawa, Canada </p> <p>91 - Cologne, Germany </p> <p>92 - Charlotte, USA</p> <p>93 - Calgary, Canada </p> <p>94 - Nagoya, Japan  </p> <p>95 - Düsseldorf, Germany </p> <p>96 - Hanoi, Vietnam</p> <p>97 - Gothenburg, Sweden </p> <p>98 - Sapporo, Japan</p> <p>99 - Bilbao, Spain </p> <p>100 - Baltimore, USA</p> <p><em>Image credits: Getty Images </em></p>

International Travel

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Handkerchief or tissue? Which one’s better for our health and the planet?

<p><em><a href="https://theconversation.com/profiles/mark-patrick-taylor-11394">Mark Patrick Taylor</a>, <a href="https://theconversation.com/institutions/macquarie-university-1174">Macquarie University</a> and <a href="https://theconversation.com/profiles/hester-joyce-122106">Hester Joyce</a>, <a href="https://theconversation.com/institutions/la-trobe-university-842">La Trobe University</a></em></p> <p>Maybe you have hay fever, COVID, a cold or the flu, and are reaching for a tissue or handkerchief.</p> <p>But which one’s better at stopping infections spreading? Which has a smaller environmental impact? Is it the hanky, which has been with us since at least Roman times? Or the more recent and widely-used paper tissue?</p> <p>You might be surprised at the results.</p> <h2>A short history of the handkerchief and tissue</h2> <p>Today, we think of hankies as something to wipe noses, and catch coughs and sneezes. But such a simple square of cloth has a complex history.</p> <p>In the first century, the Romans <a href="http://margaretroedesigns.com/wp-content/uploads/HandkerchiefHist.pdf">used</a> a <em>sudarium</em> (Latin for sweat cloth) to wipe off sweat, or to mask the mouth and face.</p> <p>Over time, people have used what we now call a handkerchief or hanky, as a head covering, as a veil and for disguise, to clean hands, for wounds and to staunch blood.</p> <p>Wealthy people have used them to signify class and manners, and for discretely wiping away phlegm rather than smearing snot on sleeves or down skirts. Royalty have used them to indicate wealth and power through their gifts of fine linen and silk handkerchiefs to favoured subjects. Henry VIII owned an extensive collection, some embossed with gold and silver.</p> <p>Handkerchiefs have also been <a href="https://www.bl.uk/collection-items/italian-handkerchief">markers of</a> love, fidelity and sexual preferences. In the late 19th century the “handkerchief code” was a system of colour coding and handkerchief placement used to indicate sexual preferences, <a href="https://www.refinery29.com/en-au/lgbtq-secret-handkerchief-code-language">which is still active</a> in LGBTQ+ communities today.</p> <p>We can <a href="https://www.euppublishing.com/doi/epub/10.3366/cult.2020.0214">trace the origins</a> of paper tissue to China in the 2nd century BC. But it wasn’t until the 1920s that tissue as we know it today <a href="https://www.kleenex.co.uk/kleenex-history">was developed</a> to remove make-up and wipe runny noses from hay fever.</p> <h2>So, which one is better for our health?</h2> <p>More than 100 years ago, a cloth hanky was considered a “<a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5248216/pdf/hosplond73063-0008b.pdf">little flag of Death</a>” because of the germs it carried and how it contaminated pockets it was left in. Later, we were urged to use a hanky <a href="http://resource.nlm.nih.gov/101449736">as</a> “coughs and sneezes spread diseases”.</p> <figure class="align-right zoomable"><figcaption></figcaption></figure> <p>Today, we know nasal secretions harbour cold-type viruses that can be <a href="https://onlinelibrary.wiley.com/doi/10.1002/jmv.22027">transferred</a> to a <a href="https://www.abc.net.au/health/talkinghealth/factbuster/stories/2011/06/02/3231404.htm">range of surfaces</a> – hands, handkerchiefs, tissues, door knobs, keyboards – sometimes surviving <a href="https://doi.org/10.1093/oxfordjournals.aje.a113473">long after</a> the initial exposure.</p> <p>So blowing your nose into a reusable cotton hanky, then touching another object, means these viruses can spread. Even if you put your cotton hanky in the wash immediately, you’d likely contaminate surfaces on the way, such as doorknobs, and use your infected hands to operate the washing machine.</p> <p>Viruses don’t tend to <a href="https://doi.org/10.1093/infdis/146.1.47">survive so long</a> on tissues. As long as you throw tissues away after using them, and don’t leave them lying around for others to pick up, the chance of passing germs to others from a used tissue is far lower.</p> <p>Then there’s the question of whether hankies or tissues are effective barriers to coughing and respiratory spray.</p> <p>Basic cloth coverings, such as handkerchiefs or bandannas, can catch sputum, as can tissues. But several studies have shown they do not effectively <a href="https://doi.org/10.1021/acs.nanolett.0c02211">filter</a> <a href="https://aaqr.org/articles/aaqr-13-06-oa-0201.pdf">respiratory aerosols</a>, or <a href="https://doi.org/10.1177/153567601001500204">stop you inhaling</a> pollutants, pathogens or <a href="https://doi.org/10.1016/j.ijheh.2018.03.012">small airborne particles</a>.</p> <h2>Which one is better for the planet?</h2> <p>If you want to look at environmental considerations, US company Ecosystem Analytics <a href="https://ecosystem-analytics.com/wp-content/uploads/2013/10/Complete-LCA-Facial-Tissue-Handkerchief.pdf">compared</a> resusable cotton hankies to disposable paper tissues using a <a href="https://doi.org/10.1007/BF02978505">lifecycle analysis</a>. It considered four measures of environmental impacts associated with production, transport, use and disposal:</p> <ul> <li> <p>climate change (sum of greenhouse gases: carbon dioxide, methane, water vapour, nitrous oxide and CFCs)</p> </li> <li> <p>ecosystem quality (chemical pollution of land and water)</p> </li> <li> <p>human health (carcinogenic and non‐carcinogenic toxicity to humans)</p> </li> <li> <p>resources (total energy requirements of non‐renewable energy and mineral extraction).</p> </li> </ul> <p>The verdict? Across the four measures, a cotton hanky had five to seven times greater impact than an equivalent tissue.</p> <p>And, by far, the greatest impacts were related to the production of each of these products, rather than using or disposing of them.</p> <p>If you’re still keen to use a cotton hanky, you could opt for organic cotton, which has a <a href="https://www.sei.org/publications/ecological-footprint-water-analysis-cotton-hemp-polyester/">lower ecological footprint</a> compared to standard cotton produced in the same location. But organic cotton production has <a href="https://www.nytimes.com/wirecutter/blog/is-organic-cotton-better-for-the-environment/">lower yields</a> than its conventional equivalent, meaning more land is needed to produce an equivalent amount, compounding the total environmental impact.</p> <p>If you want to feel better about using tissues, ones made from recycled material may be a better option. Their manufacture leads to <a href="https://doi.org/10.1007/s11367-013-0597-x">fewer</a> greenhouse gas emissions compared with making regular tissues.</p> <h2>The verdict</h2> <p>Wiping our noses with paper tissues we dispose of properly after use (and don’t store in our pocket), made from recycled material, is preferable from both a health and environmental perspective.</p> <p>But tissues don’t quite have the same panache as the historic and versatile cloth hanky.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/213065/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><a href="https://theconversation.com/profiles/mark-patrick-taylor-11394"><em>Mark Patrick Taylor</em></a><em>, Chief Environmental Scientist, EPA Victoria; Honorary Professor, School of Natural Sciences, <a href="https://theconversation.com/institutions/macquarie-university-1174">Macquarie University</a> and <a href="https://theconversation.com/profiles/hester-joyce-122106">Hester Joyce</a>, Adjunct Associate Professor, Creative Arts, <a href="https://theconversation.com/institutions/la-trobe-university-842">La Trobe University</a></em></p> <p><em>Image credits: Getty Images </em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/handkerchief-or-tissue-which-ones-better-for-our-health-and-the-planet-213065">original article</a>.</em></p>

Caring

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Do blue-light glasses really work? Can they reduce eye strain or help me sleep?

<p><em><a href="https://theconversation.com/profiles/laura-downie-1469379">Laura Downie</a>, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a></em></p> <p>Blue-light glasses are said to <a href="https://www.baxterblue.com.au/collections/blue-light-glasses">reduce eye strain</a> when using <a href="https://www.blockbluelight.com.au/collections/computer-glasses">computers</a>, improve your <a href="https://www.ocushield.com/products/anti-blue-light-glasses">sleep</a> and protect your eye health. You can buy them yourself or your optometrist can prescribe them.</p> <p>But <a href="https://mivision.com.au/2019/03/debate-continues-over-blue-blocking-lenses/">do they work</a>? Or could they do you harm?</p> <p>We <a href="https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD013244.pub2/full">reviewed</a> the evidence. Here’s what we found.</p> <h2>What are they?</h2> <p>Blue-light glasses, blue light-filtering lenses or blue-blocking lenses are different terms used to describe lenses that reduce the amount of short-wavelength visible (blue) light reaching the eyes.</p> <p>Most of these lenses prescribed by an optometrist decrease blue light transmission by <a href="https://onlinelibrary.wiley.com/doi/10.1111/opo.12615">10-25%</a>. Standard (clear) lenses do not filter blue light.</p> <p>A wide variety of lens products are available. A filter can be added to prescription or non-prescription lenses. They are widely marketed and are becoming <a href="https://onlinelibrary.wiley.com/doi/10.1111/opo.12615">increasingly popular</a>.</p> <p>There’s often an added cost, which depends on the specific product. So, is the extra expense worth it?</p> <h2>Blue light is all around us</h2> <p>Outdoors, sunlight is the main source of blue light. Indoors, light sources – such as light-emitting diodes (LEDs) and the screens of digital devices – emit varying degrees of blue light.</p> <p>The amount of blue light emitted from artificial light sources is much lower than from the Sun. Nevertheless, artificial light sources are all around us, at home and at work, and we can spend a lot of our time inside.</p> <figure class="align-center zoomable"><a href="https://images.theconversation.com/files/549210/original/file-20230920-16-tsb23b.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=1000&amp;fit=clip"><img src="https://images.theconversation.com/files/549210/original/file-20230920-16-tsb23b.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/549210/original/file-20230920-16-tsb23b.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=450&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/549210/original/file-20230920-16-tsb23b.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=450&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/549210/original/file-20230920-16-tsb23b.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=450&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/549210/original/file-20230920-16-tsb23b.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=566&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/549210/original/file-20230920-16-tsb23b.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=566&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/549210/original/file-20230920-16-tsb23b.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=566&amp;fit=crop&amp;dpr=3 2262w" alt="Blue light-filtering lenses block some blue light from screens from reaching the eye" /></a><figcaption><span class="caption">Screens emit blue light. The lenses are designed to reduce the amount of blue light that reaches the eye.</span> <span class="attribution"><a class="source" href="https://www.shutterstock.com/image-vector/blue-light-blocking-ray-filter-lens-2286229107">Shutterstock</a></span></figcaption></figure> <p>Our research team at the University of Melbourne, along with collaborators from Monash University and City, University London, sought to see if the best available evidence supports using blue light-filtering glasses, or if they could do you any harm. So we conducted a <a href="https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD013244.pub2/full">systematic review</a> to bring together and evaluate all the relevant studies.</p> <p>We included all randomised controlled trials (clinical studies designed to test the effects of interventions) that evaluated blue light-filtering lenses in adults. We identified 17 eligible trials from six countries, involving a total of 619 adults.</p> <h2>Do they reduce eye strain?</h2> <p>We found no benefit of using blue light-filtering lenses, over standard (clear) lenses, to reduce eye strain with computer use.</p> <p>This conclusion was based on consistent findings from three studies that evaluated effects on eye strain over time periods ranging from two hours to five days.</p> <h2>Do they help you sleep?</h2> <p>Possible effects on sleep were uncertain. Six studies evaluated whether wearing blue-light filtering lenses before bedtime could improve sleep quality, and the findings were mixed.</p> <p>These studies involved people with a diverse range of medical conditions, including insomnia and bipolar disorder. Healthy adults were not included in the studies. So we do not yet know whether these lenses affect sleep quality in the general population.</p> <h2>Do they boost your eye health?</h2> <p>We did not find any clinical evidence to support using blue-light filtering lenses to protect the macula (the region of the retina that controls high-detailed, central vision).</p> <p>None of the studies evaluated this.</p> <h2>Could they do harm? How about causing headaches?</h2> <p>We could not draw clear conclusions on whether there might be harms from wearing blue light-filtering lenses, compared with standard (non blue-light filtering) lenses.</p> <p>Some studies described how study participants had headaches, lowered mood and discomfort from wearing the glasses. However, people using glasses with standard lenses reported similar effects.</p> <h2>What about other benefits or harms?</h2> <p>There are some important general considerations when interpreting our findings.</p> <p>First, most of the studies were for a relatively short period of time, which limited our ability to consider longer-term effects on vision, sleep quality and eye health.</p> <p>Second, the review evaluated effects in adults. We don’t yet know if the effects are different for children.</p> <p>Finally, we could not draw conclusions about the possible effects of blue light-filtering lenses on many vision and eye health measures, including colour vision, as the studies did not evaluate these.</p> <h2>In a nutshell</h2> <p>Overall, based on relatively limited published clinical data, our review does not support using blue-light filtering lenses to reduce eye strain with digital device use. It is unclear whether these lenses affect vision quality or sleep, and no conclusions can be drawn about any potential effects on the health of the retina.</p> <p>High-quality research is needed to answer these questions, as well as whether the effectiveness and safety of these lenses varies in people of different ages and health status.</p> <p>If you have eye strain, or other eye or vision concerns, discuss this with your optometrist. They can perform a thorough examination of your eye health and vision, and discuss any relevant treatment options.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/213145/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><a href="https://theconversation.com/profiles/laura-downie-1469379"><em>Laura Downie</em></a><em>, Associate Professor in Optometry and Vision Sciences, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a></em></p> <p><em>Image credits: Getty Images</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/do-blue-light-glasses-really-work-can-they-reduce-eye-strain-or-help-me-sleep-213145">original article</a>.</em></p>

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Our planet is burning in unexpected ways - here’s how we can protect people and nature

<p><em><a href="https://theconversation.com/profiles/luke-kelly-159658">Luke Kelly</a>, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a>; <a href="https://theconversation.com/profiles/david-bowman-4397">David Bowman</a>, <a href="https://theconversation.com/institutions/university-of-tasmania-888">University of Tasmania</a>; <a href="https://theconversation.com/profiles/ella-plumanns-pouton-1470045">Ella Plumanns Pouton</a>, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a>; <a href="https://theconversation.com/profiles/grant-williamson-109967">Grant Williamson</a>, <a href="https://theconversation.com/institutions/university-of-tasmania-888">University of Tasmania</a>, and <a href="https://theconversation.com/profiles/michael-shawn-fletcher-99786">Michael-Shawn Fletcher</a>, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a></em></p> <p>People have been using fire for millennia. It is a vital part of many ecosystems and cultures. Yet human activities in the current era, sometimes called the “<a href="https://theconversation.com/did-the-anthropocene-start-in-1950-or-much-earlier-heres-why-debate-over-our-world-changing-impact-matters-209869">Anthropocene</a>”, are reshaping patterns of fire across the planet.</p> <p><a href="https://www.annualreviews.org/doi/abs/10.1146/annurev-environ-120220-055357">In our new research</a>, published in the Annual Review of Environment and Resources, we used satellite data to create global maps of where and how fires are burning. We calculated about 3.98 million square kilometres of Earth’s land surface burns each year. We also examined research spanning archaeology, climatology, ecology, Indigenous knowledge and paleoecology, to better understand the causes and consequences of fires.</p> <p>Our international team found strong evidence fires are burning in unexpected places, at unusual times and in rarely observed ways. These changes in fire patterns are threatening human lives and modifying ecosystems.</p> <p>But the future does not have to be bleak. There are many opportunities to apply knowledge and practice of fire to benefit people and nature.</p> <h2>Here’s how fire patterns are changing</h2> <p>Exploring multiple approaches and scales enables a deeper understanding of where, when and how fires burn.</p> <p>Satellite data provide evidence of changes in fire patterns at a global scale. <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2020RG000726">Annual fire season length</a> increased by 14 days from 1979 to 2020 and <a href="https://www.nature.com/articles/s41586-021-04325-1">night fires</a>, which indicate fires that cannot be quickly controlled, increased in intensity by 7.2% from 2003 to 2020.</p> <p>Other changes are apparent only when we look at data from particular regions. An increase in fire size and the frequency of large fires has recently been observed in <a href="https://www.pnas.org/doi/abs/10.1073/pnas.2103135118">forests and woodlands of the western United States</a>. Meanwhile fire-dependent grasslands and savannahs across <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/gcb.14711">Africa</a> and <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019GL082327">Brazil</a> have experienced reductions in fire frequency.</p> <p>It’s also important to consider the timescale and type of fire when interpreting changes. In Australia, <a href="https://www.nature.com/articles/s41467-021-27225-4">satellite records show</a> the frequency of very large forest fires has increased over the past four decades. At longer time scales, <a href="https://link.springer.com/article/10.1007/s13280-020-01339-3">charcoal and pollen records</a> indicate the frequency of low-intensity fires <a href="https://esajournals.onlinelibrary.wiley.com/doi/10.1002/fee.2395">decreased in parts of southeastern Australia</a> following British colonisation in 1788.</p> <h2>Changes in fire affect air, land and water</h2> <p>Many animals and plants have evolved strategies that enable them to thrive under particular fire patterns. This means changes to fire characteristics can <a href="https://www.science.org/doi/10.1126/science.abb0355">harm populations and ecosystems</a>.</p> <p><a href="https://conbio.onlinelibrary.wiley.com/doi/full/10.1111/conl.12905">Large and intense fires</a> are reducing the available forest habitat preferred by the greater glider. But a <a href="https://theconversation.com/research-reveals-fire-is-pushing-88-of-australias-threatened-land-mammals-closer-to-extinction-185965">lack of fire can be problematic too</a>. Threatened species of native rodents can benefit from food resources and habitats that flourish shortly after fire.</p> <p>There is evidence that emissions from recent fires are already modifying the atmosphere. The historically exceptional 2019–20 Australian wildfires produced <a href="https://www.science.org/doi/10.1126/science.abe1415#:%7E:text=Intense%2C%20widespread%20bushfires%20in%20Australia,from%20a%20moderate%20volcanic%20eruption.">record-breaking levels of aerosols</a> over the Southern Hemisphere, as well as substantial carbon emissions.</p> <p>The <a href="https://www.nature.com/articles/s41893-020-00610-5">wildfire smoke-related health costs</a> of the 2019–20 wildfires in Australia included an estimated 429 smoke-related premature deaths as well as 3,230 hospital admissions for cardiovascular and respiratory disorders.</p> <p>Changes in fire patterns are modifying water cycles, too. In the western United States, <a href="https://www.pnas.org/doi/10.1073/pnas.2009717118">fires are reaching higher elevations</a> and having strong impacts on <a href="https://www.pnas.org/doi/10.1073/pnas.2200333119">snow</a> and water availability.</p> <p>New studies are revealing how the air, land and water that support life on Earth are connected by fires. Smoke plumes from the 2019–20 Australian wildfires transported nutrients to the Southern Ocean, resulting in <a href="https://www.nature.com/articles/s41586-021-03805-8">widespread phytoplankton blooms</a>.</p> <h2>Humans are responsible for the changes</h2> <p>Human drivers such as climate change, land use, fire use and suppression, and transportation and extinction of species <a href="https://www.annualreviews.org/doi/abs/10.1146/annurev-environ-120220-055357">are causing shifts in fire patterns</a>.</p> <p>Increasing global temperatures and more frequent heatwaves and droughts increase the likelihood of fire by promoting hot, dry and windy conditions. A pattern of extreme fire weather outside of natural climate variation is already emerging in <a href="https://onlinelibrary.wiley.com/doi/10.1111/gcb.15388">North America</a>, <a href="https://link.springer.com/article/10.1007/s10584-014-1183-3">southern Europe</a> and <a href="https://iopscience.iop.org/article/10.1088/1748-9326/ac1e3a/meta">the Amazon basin</a>.</p> <p>Humans modify fire regimes by changing land use for agricultural, forestry and urban purposes. Until recent decades, large fires in tropical forests were uncommon. But <a href="https://www.nature.com/articles/s41586-021-03876-7">deforestation fires</a> used to clear primary forest for agriculture often promotes more frequent and intense uncontrolled fires.</p> <p>Humans have transported plants and animals across the globe, resulting in novel mixes of species that modify fuels and fire regimes. In many parts of the world, <a href="https://www.pnas.org/doi/abs/10.1073/pnas.1908253116">invasive grasses</a> have increased flammability and fire activity.</p> <p>Social and economic changes propel these drivers. Colonisation by Europeans and the displacement of Indigenous peoples and their skilful use of fire has been linked with fire changes in <a href="https://esajournals.onlinelibrary.wiley.com/doi/10.1002/fee.2395">Australia</a>, <a href="https://www.pnas.org/doi/10.1073/pnas.2116264119">North America</a> and <a href="https://royalsocietypublishing.org/doi/10.1098/rstb.2015.0174">South America</a>.</p> <h2>Using knowledge and practice of fire to achieve sustainability goals</h2> <p><a href="https://www.annualreviews.org/doi/abs/10.1146/annurev-environ-120220-055357">The pace and scale of these changes</a> represent challenges to humanity, but knowledge and practice of fire can help to achieve sustainability goals.</p> <p>This includes:</p> <ul> <li><a href="https://royalsocietypublishing.org/doi/10.1098/rstb.2015.0174">good health and wellbeing</a>, by supporting community-owned solutions and fire practices that increase social cohesion and health</li> <li><a href="https://www.sciencedirect.com/science/article/pii/S0301479718314658">sustainable cities and communities</a>, by designing green firebreaks and mixed-use areas with low fuels, strategically located in the landscape</li> <li><a href="https://www.science.org/doi/10.1126/science.aam7672">life on land</a>, by tailoring use of fire to promote and restore species and ecosystems</li> <li><a href="https://www.nature.com/articles/s41561-021-00867-1">climate action</a>, by applying low-intensity fire to promote the stability of soil organic matter and increase carbon storage</li> <li><a href="https://www.mdpi.com/1660-4601/18/8/3921">reduced inequalities</a>, by allocating resources before, during, and after wildfires to at-risk communities and residents.</li> </ul> <p>As the world changes, society as a whole needs to keep learning about the interplay between people and fire.</p> <p>A deep understanding of fire is essential for achieving a sustainable future – in other words, <a href="https://www.annualreviews.org/doi/abs/10.1146/annurev-environ-120220-055357">a better Anthropocene</a>.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/213215/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><a href="https://theconversation.com/profiles/luke-kelly-159658"><em>Luke Kelly</em></a><em>, Associate Professor in Quantitative Ecology, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a>; <a href="https://theconversation.com/profiles/david-bowman-4397">David Bowman</a>, Professor of Pyrogeography and Fire Science, <a href="https://theconversation.com/institutions/university-of-tasmania-888">University of Tasmania</a>; <a href="https://theconversation.com/profiles/ella-plumanns-pouton-1470045">Ella Plumanns Pouton</a>, PhD candidate, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a>; <a href="https://theconversation.com/profiles/grant-williamson-109967">Grant Williamson</a>, Research Fellow in Environmental Science, <a href="https://theconversation.com/institutions/university-of-tasmania-888">University of Tasmania</a>, and <a href="https://theconversation.com/profiles/michael-shawn-fletcher-99786">Michael-Shawn Fletcher</a>, Professor in Biogeography, <a href="https://theconversation.com/institutions/the-university-of-melbourne-722">The University of Melbourne</a></em></p> <p><em>Image credits: Getty Images</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/our-planet-is-burning-in-unexpected-ways-heres-how-we-can-protect-people-and-nature-213215">original article</a>.</em></p>

Travel Trouble

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If the world were coming to an end, what would be the most ethical way to rebuild humanity ‘off planet’?

<p><em><a href="https://theconversation.com/profiles/evie-kendal-734653">Evie Kendal</a>, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p>Last week, scientists announced that for the first time on record, Antarctic ice has failed to “substantially recover” over winter, in a “once in 7.5-million-year event”. Climate change is the <a href="https://theconversation.com/antarctica-is-missing-a-chunk-of-sea-ice-bigger-than-greenland-whats-going-on-210665">most likely culprit</a>.</p> <p>Petra Heil, a sea ice physicist from the Australian Antarctic Division, <a href="https://www.abc.net.au/news/2023-07-24/antarctic-sea-ice-levels-nosedive-five-sigma-event/102635204">told the ABC</a> it could tip the world into a new state. “That would be quite concerning to the sustainability of human conditions on Earth, I suspect.”</p> <p>And in March, a senior United Nations disarmament official <a href="https://press.un.org/en/2023/sc15250.doc.htm">told the Security Council</a> the risk of nuclear weapons being used today is higher than at any time since the end of the Cold War.</p> <p>Both warnings speak to concerns about Earth’s security. Will our planet be able to support human life in the future? And if not, will humanity have another chance at survival in space?</p> <h2>‘Billionauts’ and how to choose who goes</h2> <p>Over the past few years, we’ve witnessed the rise of the “billionaut”. The ultra-wealthy are engaged in a <a href="https://theconversation.com/billionaire-space-race-the-ultimate-symbol-of-capitalisms-flawed-obsession-with-growth-164511">private space race</a> costing billions of dollars, while <a href="https://www.forbes.com/sites/oliverwilliams1/2021/12/21/billionaire-space-race-turns-into-a-publicity-disaster/?sh=79056f7e5e4d">regular citizens often condemn</a> the wasted resources and contribution to global carbon emissions.</p> <p>Space – described in the <a href="https://www.unoosa.org/oosa/en/ourwork/spacelaw/treaties/introouterspacetreaty.html">Outer Space Treaty</a> as being the “province of all mankind” – risks instead becoming the playground of the elite few, as they try to escape the consequences of environmental destruction.</p> <p>But if we have to select humans to send into space for a species survival mission, how do we choose who gets to go?</p> <p>In Montreal last month, the <a href="https://irg.space/irg-2023/">Interstellar Research Group</a> explored the question: how would you select a crew for the first interstellar mission?</p> <p>A panel led by <a href="https://www.erikanesvold.com/">Erika Nesvold</a>, a co-editor of the new book <a href="https://global.oup.com/academic/product/reclaiming-space-9780197604793?cc=au&amp;lang=en&amp;">Reclaiming Space</a>, discussed the perspectives of gender minorities, people with disabilities and First Nations groups regarding the ideal composition for an off-world crew.</p> <p>I was on the panel to discuss my contribution to the book, which explores how we can promote procreation in our new off-world society, without diminishing the reproductive liberty of survivors.</p> <h2>The ultra-wealthy and reproductive slavery</h2> <p>The first step in deciding how to allocate limited spaces on our “lifeboat” is identifying and rejecting options that are practically or ethically unacceptable.</p> <p>The first option I rejected was a user-pay system, whereby the wealthy can purchase a seat on the lifeboat. A 2022 Oxfam report showed the investments of just 125 billionaires collectively contribute 393 million tonnes of carbon dioxide equivalent per year: <a href="https://www.oxfam.org/en/press-releases/billionaire-emits-million-times-more-greenhouse-gases-average-person#:%7E:text=Recent%20data%20from%20Oxfam's%20research,%C2%B0C%20goal%20of%20the">a million times more</a> than the average for most global citizens.</p> <p>If the ultra-wealthy are the only ones to survive an environmental apocalypse, there’s a risk they would just create another one, on another planet. This would undermine the species survival project.</p> <p>The second option I rejected was allowing a reproductive slave class to develop, with some survivors compelled to populate the new community. This would disproportionately impact cis-gender women of reproductive capacity, demanding their gestational labour in exchange for a chance at survival.</p> <p>Neither a user-pay system nor reproductive slave labour would achieve the goal of “saving humanity” in any meaningful way.</p> <p>Many would argue preserving human values - including equality, reproductive liberty, and respect for diversity - is more important than saving human biology. If we lose what makes us unique as a species, that would be a kind of extinction anyway.</p> <p>But if we want humanity to survive, we still need to build our population in our new home. So what other options do we have?</p> <h2>Reproduction and diversity</h2> <p>How can we avoid discrimination on the basis of reproductive capacity – including age, sexuality, <a href="https://theconversation.com/infertility-through-the-ages-and-how-ivf-changed-the-way-we-think-about-it-87128">fertility status</a> or personal preference?</p> <p>We could avoid any questions about family planning when selecting our crew. This would align with <a href="https://www.seek.com.au/career-advice/article/illegal-interview-questions-what-employers-have-no-right-to-ask">equal opportunity policies</a> in other areas, like employment. But we would then have to hope enough candidates selected on other merits happen to be willing and able to procreate.</p> <p>Alternatively, we could reserve a certain number of places for those who agree to contribute to population growth. Fertility would then become an inherent job requirement. This might be similar to taking on a role as a <a href="https://theconversation.com/surrogacy-laws-why-a-global-approach-is-needed-to-stop-exploitation-of-women-98966">surrogate</a>, in which reproductive capacity is essential.</p> <p>But what if, after accepting such a position on the mission, someone changed their mind about wanting children? Would they be expected to provide some sort of compensation? Would they be vulnerable to retaliation?</p> <p>The more we focus on procreation, the less diversity we will preserve in the species as a whole – especially if we deliberately select against diverse sexualities, disabilities and older people.</p> <p>A lack of diversity would also threaten the long-term viability of the new society. For example, even if we exclude all physiologically or socially infertile people from the initial crew, these traits will reappear in future generations.</p> <p>The difference is: these children would be born into a less accepting community. Cooperation will be essential for the new human society – so promoting hostility would be counterproductive.</p> <p>So, what options are left? Using a random global sample to select travellers might alleviate concerns about equity and fairness. But the ability of a random sample to maximise our survival as a species would depend on how large the sample can be.</p> <p>A global sample would minimise bias. But there’s a risk it might yield a crew without doctors, engineers, farmers or other essential personnel.</p> <h2>Random selection versus a points-based system</h2> <p>The best balance between competing needs might be a stratified random sampling method, involving randomly selecting survivors from predetermined categories. Reproductive potential might be one category. Others might focus on other elements of practical usefulness or contribution to human diversity.</p> <p>Another option is a points-based system, whereby different skills and characteristics are ranked in terms of their desirability. In this system, an elderly person who speaks multiple languages may score higher than a physiologically fertile young person, due to their ability to substantially contribute to language preservation and education.</p> <p>This does not entirely eliminate the potential for discrimination, of course. Someone would need to decide which traits are most desirable and valuable to the new human society.</p> <p>However we determine our lifeboat candidates, it should be carefully considered. In our attempt to “save humanity”, we must avoid sacrificing the very things that make us human.</p> <hr /> <p><em>Evie Kendal is a contributor to <a href="https://global.oup.com/academic/product/reclaiming-space-9780197604793?cc=au&amp;lang=en&amp;">Reclaiming Space: Progressive and Multicultural Visions of Space Exploration</a> (Oxford University Press)<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/210647/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></em></p> <p><em><a href="https://theconversation.com/profiles/evie-kendal-734653">Evie Kendal</a>, Senior lecturer of health promotion, <a href="https://theconversation.com/institutions/swinburne-university-of-technology-767">Swinburne University of Technology</a></em></p> <p><em>Image credits: Getty Images</em></p> <p><em>This article is republished from <a href="https://theconversation.com">The Conversation</a> under a Creative Commons license. Read the <a href="https://theconversation.com/if-the-world-were-coming-to-an-end-what-would-be-the-most-ethical-way-to-rebuild-humanity-off-planet-210647">original article</a>.</em></p>

Travel Trouble

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The 7 most addictive (and delicious) foods on the planet

<p><strong>Why we can't get enough</strong></p> <p>What is it about the three Cs: Chocolate, cheese and chips? For some reason, we can never get enough of them. But wanting to chow on a particular food is one thing, being addicted to it is another. Fact is, you can become addicted to a certain food, and you can blame your brain’s response to it. That’s because certain foods elicit a release of dopamine in the brain, which can lead to more cravings for that particular treat, especially when it comes to foods that are high in sugar, salt and/or fat. Addictive foods are ones that hit your brain right in its pleasure centre, ostensibly telling you that you need more, more, more.</p> <p>“When this pleasure/reward centre is stimulated, the brain starts secreting dopamine and other chemicals that make us enjoy the experience even more,” says registered dietitian Ashvini Mashru. “Because your brain loves the sensation caused by that dopamine release, it seeks more of it by creating cravings, that if listened to can cause a vicious cycle of addiction.”</p> <p><strong>Chocoholics take note</strong></p> <p>That bowl of Smarties sitting on your colleague’s desk is a delicious temptation, a crunchy chocolatey treat that’s hard to resist. What we know is that chocolate is one of the most addictive foods around because it binds to the same pleasure centres in the brain as alcohol and certain drugs, according to a 2011 study conducted by Drexel University. </p> <p>It also boasts a nice ‘mouth feel’, which stimulates oxytocin production, another feel-good hormone, according to Dan DeFigio, author of Beating Sugar Addiction for Dummies. “Over time, our brains start looking for that dopamine hit, and every time we eat chocolate, it reinforces that ‘wiring,’” he says.</p> <p><strong>More cheese please</strong></p> <p>If you’ve hovered over a cheese platter and piled up the cubes, you’ll be relieved to know that it’s not just you. Cheese, which is generally high in fat and cholesterol, also contains a substance called casomorphin that binds to the opioid or feel-good receptors in the brain. </p> <p>“Casomorphins attach to neurotransmitters in our brains and release dopamine, feel-good chemicals, that often lead us to wanting more,” says Dr Neal Barnard, author of The Cheese Trap. “While cheese does have its health benefits, it also can be seriously addictive.”</p> <p><strong>Carb fix</strong></p> <p>Reach into that bowl of potato chips, tortilla chips or pretzels over and over again, and you’ll know something is happening on the addiction front. And, while there’s no particular compound in these foods that bind to specific brain receptors to cause a euphoric, stimulating, or addictive behaviour, there’s something else at play. </p> <p>“Simple carbohydrates are seen as ‘addictive’ because they cause a quick glucose release, and this quickly increases a person’s energy, says nutritionist Celina Jean. “This energy will quickly be used up, and then you’ll be forced to eat more simple carbohydrates to keep your blood sugar raised.”</p> <p><strong>Oh, sweet sips</strong></p> <p>Not only do sugary soft drinks (including sweet tea) provide us with very little nutrients, but one 375mL can contain a staggering 43 grams of sugar. Like sugary treats, fizzy drinks can stimulate the release of dopamine. Add caffeine and you’re getting a double-energy hit. </p> <p>“Once you’re hooked on caffeine, you can suffer symptoms of withdrawal if you try to stop, including sluggishness, headaches and emotional distress,” says Mashru.</p> <p><strong>Pass the fries</strong></p> <p>Hot chips or French fries are typically crisp, hot and salty. This is a triple-threat that signals the tongue and the brain to eat more, Mashru says. The fat content in fries triggers receptors in our mouths that send a signal to our brain and gut reinforcing the desire to eat more. </p> <p>“These little potato sticks are also a comfort food,” Mashru says. “Therefore, every time you go through the line in a restaurant and see them on the menu, you may find the urge to order them as a side to your entrée irresistible.”</p> <p><strong>Ice cream, you scream</strong></p> <p>Cravings for ice cream can be insatiable – it’s all about the sugar content and creamy texture, and researchers agree that foods like ice cream, which is basically cream and milk, stimulate the brain in the same way drugs do, inducing behaviours that resemble addiction, says dietitian Keri Glassman. </p> <p>“The sugar ‘highs’ and ‘lows’ you experience are consistent with sugar ‘dependency’,” she says. “When your body gets used to sugar, you feel out of sorts when you consume less, which causes you to eat more.”</p> <p><strong>Pizza</strong></p> <p>Whether it’s the stringy salty mozzarella cheese, the fluffy dough or the sugar in the tomato sauce, pizza ranks first in food addiction, according to a recent University of Michigan study. </p> <p>That’s because when you eat it, your blood sugar zips up quickly and then when it drops, you feel hungry again and want more.</p> <p><em>Image credits: Getty Images </em></p> <p><em>This article originally appeared on <a href="https://www.readersdigest.co.nz/food-home-garden/the-most-addicting-foods-on-the-planet" target="_blank" rel="noopener">Reader's Digest</a>. </em></p>

Food & Wine

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Billionaire throws star-studded party for most famous names on the planet

<p dir="ltr">The most famous names on the planet have all gathered for an exclusive party with billionaire Michael Rubin to celebrate the American independence day weekend. </p> <p dir="ltr">Congregating at a luxurious mansion in the Hamptons, the businessman and philanthropist hosted his annual white party, sharing a highlights reel of the star-studded day on Twitter. </p> <p dir="ltr">Among the famous faces were Leo DiCaprio, Jennifer Lopez and Ben Affleck, Beyonce and Jay-Z, Tom Brady, Kevin Hart and a plethora of Kardashians. </p> <p dir="ltr">The 350 A-listers in attendance were treated to musical performances by Usher and Ne-Yo, and $700 bottles of champagne and tequila as they partied from the 5pm kick-off all the way through until 4am.</p> <blockquote class="twitter-tweet"> <p dir="ltr" lang="en">A literal movie - white party 2023 recap <a href="https://t.co/1D3vlpCNBq">pic.twitter.com/1D3vlpCNBq</a></p> <p>— Michael Rubin (@michaelrubin) <a href="https://twitter.com/michaelrubin/status/1676363041288462338?ref_src=twsrc%5Etfw">July 4, 2023</a></p></blockquote> <p dir="ltr">The famous guests were spotted pulling up in style in their parade of expensive cars and helicopters, and being escorted into the party by armies of valets and security guards.</p> <p dir="ltr">Among them was Affleck and Lopez, who brought along the actor’s 17-year-old daughter, Violet, whom he shares with ex-wife Jennifer Garner.</p> <p dir="ltr">Kevin Hart and his wife, Eniko Parrish, were spotted among the many celebrity couples drinking and dancing the night away, along with Justin Bieber and his model wife, Hailey.</p> <p dir="ltr">Rubin, 49, and his girlfriend, Camille Fishel, 32, hosted the star-studded event, sparing no expense when it came to looking after their guests, as they do each year. </p> <p dir="ltr">Rubin has an estimated fortune of more than $16 billion, making him one of the richest men in America.</p> <p dir="ltr"><em>Image credits: Twitter</em></p>

Beauty & Style

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How to beat the retirement blues

<p>When people plan their retirement they don’t usually expect Post retiring depression (PRD). This kind of depression usually stems from dashed expectations, financial trouble or feeling lost and lonely. That’s why we’ve got four top tips to avoid PRD and enjoy your free time.</p> <p><strong>1. Plan it out</strong></p> <p>Know what you want to do, not what you think you should be doing. Don’t hold back in indulging yourself, travelling the world, volunteering abroad – the temporary discomfort of not knowing is better than realising when it’s too late that you never completed your bucket list.</p> <p><strong>2. Routine</strong></p> <p>A sudden lack of structure can become exhausting or at least unsettling. Schedule activities such as exercise, housework, errands, and social time. Then let the day flow from there.</p> <p><strong>3. Keep active</strong></p> <p>There is a lot of research to show that the people who cope best with retirement are those who stay active and involved. This might include:</p> <ul> <li>Developing an old hobby or starting a new one. </li> <li>Staying physically active, through walking, swimming, gym or sport. Make sure your exercise routine is appropriate for your physical capacities and limitations. </li> <li>Volunteering with a charity or church group. </li> <li>Working part-time. </li> <li>Studying a course.</li> </ul> <p><strong>4. Stay in touch</strong></p> <p>Loneliness and isolation can be easily avoided, so don’t fall into the trap of feeling alone. Make the effort to stay in contact with family and friends. Offer to babysit your grandchildren. Check out local community centres for upcoming activities you might enjoy. Even if you're not sure try something new, you might surprise yourself!</p> <p><em>Images: Getty</em></p>

Retirement Life

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"I fell for it!": Boys in blue crash gender reveal party

<p>One Sydney couple have taken their friends and family by surprise with their high-stakes gender reveal, where the father-to-be was apparently put under arrest by two police officers. </p> <p>Mina Ibrahim revealed their elaborate prank with a video posted to his TikTok account. Mina’s video begins with footage of the moment of his ‘arrest’, before it cuts to the TikToker at a later date, explaining that “that’s me being arrested at my baby’s gender reveal.” </p> <p>He goes on to share the full video, and a promise that the ending will answer any questions his viewers may have.</p> <p>In the clip, the parents-to-be can be seen talking to two uniformed NSW ‘police officers’, guests all around them, with Mina asking for onlookers to get their phones out. He then pushes one of the officers, telling them to leave, and both grab him before attempting to handcuff him, while his pregnant partner attempts to intervene. </p> <p>As family members rush to assist, one of the officers calls for everyone to calm down, then delivers news that takes them all by surprise - and delight - by telling them, “it’s a baby girl.” </p> <p>“So it was the cops who announced to everyone that I was having a baby girl,” present-day Mina informed his audience, before noting that there was a fake balloon inside to throw their guests off the surprise scent. </p> <div class="mol-embed" style="margin: 0px 0px 8px; padding: 0px; min-height: 1px; letter-spacing: -0.16px; text-align: center; font-family: graphik, Arial, sans-serif; font-size: 16px; background-color: #ffffff;"> <blockquote id="v34606683345148116" class="tiktok-embed" style="margin: 18px auto; padding: 0px; min-height: 1px; letter-spacing: -0.01em; position: relative; width: 605px; box-sizing: border-box; line-height: 1.15; overflow: hidden; text-size-adjust: 100%; font-family: proxima-regular, PingFangSC, sans-serif; max-width: 605px; min-width: 325px;" cite="https://www.tiktok.com/@mina.ibs/video/7232964823296773383" data-video-id="7232964823296773383" data-embed-from="oembed"><p><iframe style="letter-spacing: -0.01em; border-width: initial; border-style: none; width: 605px; height: 735px; display: block; visibility: unset; max-height: 735px;" src="https://www.tiktok.com/embed/v2/7232964823296773383?lang=en-GB&amp;referrer=https%3A%2F%2Fwww.dailymail.co.uk%2Fnews%2Farticle-12082153%2FGender-reveal-party-prank-sees-cops-arrest-father-be.html&amp;embedFrom=oembed" name="__tt_embed__v34606683345148116" sandbox="allow-popups allow-popups-to-escape-sandbox allow-scripts allow-top-navigation allow-same-origin"></iframe></p></blockquote> </div> <p>The prank attracted thousands of views online, with many flocking to his comments section to share their congratulations with the parents-to-be. </p> <p>Others, while thrilled for them and their happy news, were open about their concern, having fallen for the trick right along with the couple’s loved ones. </p> <p>“I fell for it and I was worried for your wife!!!,” one confessed. “I was freaking out hahahah you got me”.</p> <p>“I was worried too haha … you scared me,” another said. </p> <p>“Omygosh! I was ready to sue them coppas with you!” came one response, “but congratsss! What a way to reveal!”</p> <p>One other simply wanted to know if the entire situation was even allowed, believing that impersonating the police may not be. </p> <p>And another had simply been suspicious from the very start, noting “Broooo the whole time I was like … something ain’t right! He’s not carrying his gun”.</p> <p><em>Images: TikTok</em></p>

Family & Pets

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Aussie author of "Puberty Blues" dies at 64

<p dir="ltr">Gabrielle Carey, co-author of the iconic novel <em>Puberty Blues</em>, has passed away at 64. </p> <p dir="ltr">The news was reportedly broken by Carey’s old friend and co-writer Kathy Lette, who was the other half of the creative powerhouse that brought<em> Puberty Blues </em>to life. </p> <p dir="ltr">In a post to social media, Lette shared a throwback picture of the pair in their younger years, and wrote, “I’m deeply saddened by the tragic news about my old friend Gabrielle Carey. </p> <p dir="ltr">“I have such happy memories of our teenage years. They were halcyon, heady days full of love, laughter and adventure.</p> <p dir="ltr">“We made some mischief and broke some barriers by writing <em>Puberty Blues</em> – our raw, earthy take on the brutal treatment of young women in the Australian surfing scene which is sadly, still so relevant. </p> <p dir="ltr">“My heartfelt condolences to her family and friends.”</p> <blockquote class="twitter-tweet"> <p dir="ltr" lang="en">I’m deeply saddened by the tragic news about my old friend Gabrielle Carey. I have such happy memories of our teenage years. They were halcyon, heady days full of love, laughter and adventure. 1/2 🧵 <a href="https://t.co/2wZZiRf1hd">pic.twitter.com/2wZZiRf1hd</a></p> <p>— Kathy Lette (@KathyLette) <a href="https://twitter.com/KathyLette/status/1654136967636959234?ref_src=twsrc%5Etfw">May 4, 2023</a></p></blockquote> <p dir="ltr">The groundbreaking book they penned together,  which went on to be adapted as both a movie and a hit TV series, was a candid - then-controversial - story of two teenage girls growing up in Sydney’s Sutherland Shire. </p> <p dir="ltr">It pushed boundaries, captivated young audiences while tackling themes many did not expect for said target audience, and is regarded by many as being the first Australian teenage novel to be written by teens.</p> <p dir="ltr">From <em>Puberty Blues</em>, Carey went on to publish memoirs and nonfiction works, with another of her books - her 1984 <em>Just Us</em>, which covered her relationship with rapist and prisoner Terry Haley, who she married while he was imprisoned - also made into a telemovie in 1986. </p> <p dir="ltr">No suspicious circumstances surrounded her death, according to <em>The Australian</em>, though the tragic news comes just months after she wrote about her father’s suicide in <em>The Sydney Morning Herald</em>. </p> <p dir="ltr">At the time, Carey had revealed she was afraid of reaching 64, as that was when he too had passed on.</p> <p dir="ltr">“It was only decades later, when my father died from suicide on the very day he turned 64, that I became terrified of that number,” she wrote. “If I have inherited my father’s disposition for depression, did that mean I would also end up in an early grave?</p> <p dir="ltr">Carey’s early passing is one that has hit her friends and her fans hard, with many joining Lette in sharing their grief and their condolences on social media. </p> <p dir="ltr">“Farewell dear Gabrielle. You were a sister in the cause of mental illness, its impact &amp; our children. I’m enriched for having known you,” one supporter wrote. “Thank you.”</p> <p dir="ltr">“Writer - Reader - Intellectual - Joycean (fanatical) - Elizabeth von Arnim devotee - Avid Gardener - Rose Petal Jam Maker - Football Follower - Kayaker - Yogi - Joker - Irrepressible Spirit - Hobbit - Underground Writer - My Friend,” friend and fellow writer Yumna Kassab wrote. “I will always miss you.”</p> <p dir="ltr">“So sorry for your loss,” one fan said in response to Lette’s tweet. “You have no idea how much as a girl growing up in a coastal town with a surfing scene I understood <em>Puberty Blues</em>. I saw it every day. You &amp; Gabrielle laid it all bare &amp; made girls stand up for themselves. Thank you”.</p> <p dir="ltr">“My deepest condolences Kathy,” another offered. “The two of you wrote something so treasured by Gen X girls. It was our ‘how to say no guide’. Our Teen handbook. But it still let us live our lives &amp; learn as we went. RIP Gabrielle Carey.”</p> <p dir="ltr"><em>Images: Facebook</em></p>

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15 facts you won’t believe are true

<p>Sometimes we become so jaded that we forget the world is an amazing place.</p> <p>In this list we’ve put together 15 facts you won’t believe are true.</p> <p><strong>To see the full list of amazing facts, scroll down.</strong></p> <p>1. Honey will <a href="http://www.smithsonianmag.com/science-nature/the-science-behind-honeys-eternal-shelf-life-1218690/?no-ist" target="_blank" rel="noopener"><span><strong>never go off</strong></span></a>, no matter how long you store it.</p> <p>2. The Turritopsis Nutricula jellyfish is <a href="http://immortal-jellyfish.com/" target="_blank" rel="noopener"><span><strong>c</strong></span></a><span style="text-decoration: underline;"><strong><a href="http://immortal-jellyfish.com/" target="_blank" rel="noopener">onsidered biologically immortal</a></strong></span>.</p> <p>3. The heart of a blue whale is so big a human could potentially swim through its arteries (of course why you’d want to do so is another matter altogether).</p> <p>4. Yet the throat of a blue whale is <a href="https://en.wikipedia.org/wiki/Blue_whale#Description_and_behaviour" target="_blank" rel="noopener"><span><strong>so small</strong></span></a> (comparatively speaking at least) it is physically incapable of swallowing anything bigger than a beach ball. </p> <p>5. For every person on Earth there are <a href="http://www.peta.org/issues/wildlife/dealing-household-guests/ants/" target="_blank" rel="noopener"><span><strong>around 1.6 million ants</strong></span></a>.</p> <p>6. An octopus has <a href="http://www.smithsonianmag.com/ist/?next=/science-nature/ten-curious-facts-about-octopuses-7625828/" target="_blank" rel="noopener"><span><strong>three hearts</strong></span></a>.</p> <p>7. Feng shui was originally the art of choosing the <a href="http://www.awarenessmag.com/marapr07/ma07_feng_shui.htm" target="_blank" rel="noopener"><span><strong>best place for a grave</strong></span></a>.</p> <p>8. There are <span style="text-decoration: underline;"><strong><a href="http://www.sciencedaily.com/releases/2008/06/080603085914.htm" target="_blank" rel="noopener">ten times more bacteria</a></strong></span> than cells in the human body.</p> <p>9. Believe it or not, this is what sand looks like under a microscope:</p> <p>10. Oxford University actually <a href="http://thetab.com/uk/oxford/2013/10/20/six-things-oxford-predates-11736" target="_blank" rel="noopener"><span><strong>predates the Aztec Empire</strong></span></a>.</p> <p>11. No one has <a href="https://www.ar15.com/archive/topic.html?b=1&amp;f=5&amp;t=1163790" target="_blank" rel="noopener"><span><strong>successfully tamed</strong></span></a> an African elephant.</p> <p>12. Catfish have <a href="http://www.itv.com/news/central/2015-07-09/ten-facts-about-fish-that-might-surprise-you/" target="_blank" rel="noopener"><span><strong>27,000 taste buds</strong></span></a> (four times as many as humans). </p> <p>13. Santa Claus <a href="https://en.wikipedia.org/wiki/Basil_of_Caesarea#Commemorations_of_Basil" target="_blank" rel="noopener"><span><strong>is called Basil</strong></span></a> in Cyprus.</p> <p>14. Scientists have suggested <a href="http://www.bbc.com/news/science-environment-24477667" target="_blank" rel="noopener"><span><strong>rain is made</strong></span></a> from diamonds on Saturn and Jupiter.</p> <p>15. The image on the left is a candle burning on Earth, and the image on the right is a candle burning in a zero gravity environment. What a difference! </p> <p><strong>Related links:</strong></p> <p><span style="text-decoration: underline;"><em><a href="../news/news/2016/03/couple-give-60-million-lottery-away/"><strong>Couple gives $60 million lottery win away</strong></a></em></span></p> <p><span style="text-decoration: underline;"><em><a href="../news/news/2016/03/find-letter-t-image-puzzle/"><strong>Can you find the letter “T” in this image?</strong></a></em></span></p> <p><span style="text-decoration: underline;"><em><a href="../news/news/2016/03/stunning-images-antarctica-remote-beauty/"><strong>Stunning images of Antarctica’s remote beauty</strong></a></em></span></p> <p><em>Image credit: Shutterstock</em></p>

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Hill Street Blues star passes away

<p> Hill Street Blues star Barbara Bosson has passed away aged 83.</p> <p>Bosson, who played Fay Furillo in the American police drama, was a popular TV star in the ‘80s, earning five consecutive Emmy nominations for her role. She was also the ex-wife of TV giant Steven Bohcho, who created <em>Hill Street Blues </em>and several other hit shows at the time.</p> <p>The news of Bosson’s death was shared by her son, Jesse Bohcho, who shared an image of he and his mother when he was a child.</p> <p>"More spirit and zest than you could shake a stick at. When she loved you, you felt it without a doubt. If she didn't, you may well have also known that too. Forever in our hearts. I love you Mama. Barbara "Babs" Bosson Bochco 1939-2023," he captioned the image.</p> <p>Dirty Dancing star Jennifer Grey shared her support, commenting a red heart under Bochco’s Instagram.</p> <p>Bosson was also known for her roles in shows including<em> Murder One</em>, <em>Hooperman</em> and films including <em>Cop Rock</em> and <em>Calendar Girl Murders</em>.</p> <p>Hill Street Blues proved Bosson's main claim to fame, with her leaving the show in 1985 during its sixth season after being fired from the project over creative disagreements.</p> <p>Bosson and Steven Bohcho went on to work together on other projects, including the <em>Rockford Files</em> spin-off <em>Richie Brockelman</em>, <em>Private Eye</em>, <em>Hooperman</em> and the musical <em>Cop Rock</em>.</p> <p>The pair divorced in 1997 but continued to co-parent their son Jesse, who was born in 1975. Steven died in 2018 at the age of 73.</p> <p>Further details of Bosson’s death are yet to be revealed.</p> <p><em>Image credit: Instagram</em></p>

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How to make the most of your hard-earned savings

<p>When you have a lump sum of money, it can often be very confusing to know what to do with it, when putting it into a bank offers little in the way of interest or reward. Chances are you might have been neglecting your savings, leaving them languishing in accounts that pay very little, if anything at all. But there is a better option that could see you drastically increasing your savings.</p> <p>A term deposit taker, such as boutique investment company Blue Sky money, can offer you far greater returns on your deposit – an impressive 7 per cent, around twice that which banks offer. Better yet, with all profits staying within and benefiting the community, you can also enjoy the knowledge that you’re helping to make a difference to New Zealanders while growing your nest egg.</p> <p><a href="https://blueskymoney.co.nz/" target="_blank" rel="noopener"><strong><img src="https://oversixtydev.blob.core.windows.net/media/2022/12/Blue-Sky-7.jpg" alt="" width="1280" height="1062" /></strong></a></p> <p><strong>Set and forget</strong></p> <p>Most of us are far too busy and time-poor to spend too much time tending to our finances. But that doesn’t mean we don’t want to see them grow! At Blue Sky money, with a minimum deposit of $30,000 and a minimum 12-month fixed term, you don’t need to think about anything. You’ll have your own personal customer service agent, and can just sit back and watch as your interest is calculated and paid into your account monthly – no fees, no charges.</p> <p>Believing that looking after your finances should be a pleasure, not a chore, Blue Sky money prides itself on offering a superior service and being far more user friendly than banks, so not only will your money work harder, but you’ll enjoy the satisfaction of feeling part of a financial family that truly cares about your wellbeing.</p> <p>Blue Sky money can also assist with small to medium loans for land, houses or other assets, are on hand to help with reverse mortgages and are even investing in retirement villages. And in an exciting new addition, from 2023 Blue Sky is launching its own travel club for all those who place their deposits. You’ll receive special deals and tour packages, ensuring your money goes even further, while enjoying everything the world has to offer.</p> <p><img src="https://oversixtydev.blob.core.windows.net/media/2022/12/money-laptop-happy-GettyImages-1307391886.jpg" alt="" width="1280" height="720" /></p> <p><strong>Improving New Zealanders’ lives</strong></p> <p>And while getting some much-needed extra cash seems like a pretty good deal all on its own, you’ll also have the piece of mind of knowing that with Blue Sky money – a family run business owned by Blue Sky charity, which is registered in New Zealand – all profits stay within New Zealand. With a philosophy of trying to make the world a better place, Blue Sky invests in research and development to better New Zealanders lives – everything from groundbreaking cancer treatment using ultrasound, to sustainable energy, sea trailers and indestructible home builds.</p> <p>Blue Sky money can also assist with small to medium loans for land, houses or other assets, and are available to help with reverse mortgages. And in an exciting new addition, from 2023 Blue Sky is launching its own travel club, where you can receive special deals and tour packages.</p> <p>So if you’re looking to make your savings work harder for you, while aligning yourself with a humanitarian company that’s working to improve the lives of New Zealanders, be sure to get in touch with the Blue Sky team at <a href="https://blueskymoney.co.nz/" target="_blank" rel="noopener">blueskymoney.co.nz</a></p> <p><img src="https://oversixtydev.blob.core.windows.net/media/2022/12/tropical-island-GettyImages-1360554439.jpg" alt="" width="1280" height="720" /></p> <p><em>Images: Supplied. </em></p> <p><em>This is a sponsored article produced in partnership with <a href="https://blueskymoney.co.nz/" target="_blank" rel="noopener">Blue Sky money</a>. </em></p>

Money & Banking

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Who wants to be a billionaire? Thankfully for the planet, most people don’t

<p>Reality check: most people don’t actually want to be billionaires.</p> <p>A <a href="https://dx.doi.org/10.1038/s41893-022-00902-y" target="_blank" rel="noreferrer noopener">new study</a> is challenging the long-held economic belief that it’s in human nature to have unlimited wants, finding this widely held assumption only applies to a minority of people.</p> <p>In a survey of nearly 8,000 people from 33 countries across six continents, social psychologists asked people how much money they wanted to accrue in their “absolutely ideal life”.</p> <p>They found that in 86% of countries most people thought they could achieve the ideal life with US$10 million (AUD$14.3 million) or less, and in some countries the ideal was as little as US$1 million (AUD$1.4 million), across their entire lives.</p> <p>To put that into context, the current richest person in the world, Elon Musk, has a net worth of more than US$200 billion – that’s enough for 200,000 people to achieve their perceived ideal lives.</p> <p>The push to continually increase individual wealth and pursue unending economic growth has had dire environmental consequences for the planet, with resource use and <a href="https://cosmosmagazine.com/earth/earth-sciences/global-pollution-mapped-for-good-and-bad/" target="_blank" rel="noreferrer noopener">pollution</a> increasing alongside wealth.</p> <p>But these findings, published in <em>Nature Sustainability</em>, challenge the idea that approaches relying on limiting wealth and growth to achieve sustainability are against human ideals and aspirations.</p> <p>“The findings are a stark reminder that the majority view is not necessarily reflected in policies that allow the accumulation of excessive amounts of wealth by a small number of individuals,” explains co-author Dr Renata Bongiorno, a social psychologist at the University of Exeter and Bath Spa University in the UK.</p> <p>“If most people are striving for wealth that is limited, policies that support people’s more limited wants, such as a wealth tax to fund sustainability initiatives, might be more popular than is often portrayed.”</p> <h2>Would you want to win a billion in the lottery?</h2> <p>The researchers specifically asked people to imagine their absolutely ideal life, and then consider how much money would want in that life.</p> <p>Participants made a choice of their preferred prize in a hypothetical lottery, choosing from US$10,000, US$100,000, US$1 million, US$10 million, US$100 million, US$1 billion, US$10 billion or US$100 billion.</p> <p>It was emphasised that the odds of winning each lottery were identical.</p> <p>The researchers hypothesised that people with insatiable wants – those who cannot conceive of a point where their wants would be fully satiated, so they will always aspire to accumulate more/better goods – would choose the maximum of US$100 billion over all the lesser (limited) amounts.</p> <p>But while people with unlimited wants were identified in every country surveyed, they were always in the minority. They tended to be younger people and city-dwellers, who placed more value on success, power and independence.</p> <p>They were also more common in countries with greater acceptance of inequality, and in countries that are more collectivistic – that focus more on group than individual responsibilities and outcomes. </p> <p>“The ideology of unlimited wants, when portrayed as human nature, can create social pressure for people to buy more than they actually want,” says lead researcher Dr Paul Bain, from the Department of Psychology at the University of Bath, UK.</p> <p>“Discovering that most people’s ideal lives are actually quite moderate could make it socially easier for people to behave in ways that are more aligned with what makes them genuinely happy and to support stronger policies to help safeguard the planet.”</p> <p><em>Image credits: Getty Images</em></p> <p><em><img id="cosmos-post-tracker" style="opacity: 0; height: 1px!important; width: 1px!important; border: 0!important; position: absolute!important; z-index: -1!important;" src="https://syndication.cosmosmagazine.com/?id=195370&amp;title=Who+wants+to+be+a+billionaire%3F+Thankfully+for+the+planet%2C+most+people+don%E2%80%99t" width="1" height="1" /></em></p> <div id="contributors"> <p><em>This article was originally published on <a href="https://cosmosmagazine.com/news/who-wants-to-be-a-billionaire/" target="_blank" rel="noopener">cosmosmagazine.com</a> and was written by Imma Perfetto. </em></p> </div>

Retirement Income

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Astronomers have detected another ‘planet killer’ asteroid. Could we miss one coming our way?

<p>If you surfed the web this morning, you may have seen news of the latest existential threat to humanity: a “planet killer” asteroid named 2022 AP7.</p> <p>Luckily for us 2022 AP7 “has no chance to hit the Earth currently”, <a href="https://www.theguardian.com/science/2022/nov/01/huge-planet-killer-asteroid-discovered-and-its-heading-our-way">according</a> to Scott Sheppard at the Carnegie Institution for Science. He and his international team of colleagues <a href="https://iopscience.iop.org/article/10.3847/1538-3881/ac8cff/pdf">observed 2022 AP7</a> in a trio of “rather large” asteroids obscured by the Sun’s glare (the other two don’t pose a risk).</p> <p>2022 AP7 orbits the Sun every five years, and currently crosses Earth’s orbit when Earth is on the other side of the Sun to it. Eventually its movement will sync with Earth’s and it will cross much closer by, but this will be centuries into the future.</p> <p>We simply don’t know enough about 2022 AP7 to precisely predict the danger it may pose centuries from now. At the same time, we suspect there could be other “planet killers” out there yet to be discovered. But how many? And what’s being done to find them?</p> <p><strong>What makes a planet killer?</strong></p> <p>Asteroid 2022 AP7 is the largest potentially hazardous asteroid (PHA) found in eight years, with a diameter between 1.1km and 2.3km. For context, an asteroid with a diameter more than 1km is enough to trigger a <a href="https://en.wikipedia.org/wiki/Cretaceous%E2%80%93Paleogene_extinction_event">mass extinction event</a> on Earth.</p> <p>As well as having a diameter greater than 1km, an asteroid also needs to have an orbit that crosses Earth’s to be considered potentially dangerous. In the case of 2022 AP7, any threat is centuries down the track. The important point is it has been detected and can now be tracked. This is the best possible outcome.</p> <p>It is estimated we’ve already <a href="https://theconversation.com/in-a-world-first-nasas-dart-mission-is-about-to-smash-into-an-asteroid-what-will-we-learn-189391">discovered</a> about 95% of potentially hazardous asteroids, and that there are fewer than 1,000 of these. The work of Sheppard and colleagues highlights that hunting down the remaining 5% – some 50 asteroids – will be a massive effort.</p> <figure class="align-center "><img src="https://images.theconversation.com/files/492923/original/file-20221102-25180-74aqvo.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/492923/original/file-20221102-25180-74aqvo.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=304&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/492923/original/file-20221102-25180-74aqvo.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=304&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/492923/original/file-20221102-25180-74aqvo.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=304&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/492923/original/file-20221102-25180-74aqvo.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=382&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/492923/original/file-20221102-25180-74aqvo.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=382&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/492923/original/file-20221102-25180-74aqvo.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=382&amp;fit=crop&amp;dpr=3 2262w" alt="" /><figcaption><span class="caption">Statistically, there’s less of a chance of a larger asteroid colliding with Earth compared to a smaller one.</span> <span class="attribution">NASA</span></figcaption></figure> <p><strong>What constitutes a near miss?</strong></p> <p>NASA <a href="https://www.jpl.nasa.gov/asteroid-watch">closely tracks</a> all known objects in the Solar System. But every now and again an object will catch us off guard.</p> <p>In 2021, we had a close call with an asteroid called <a href="https://en.wikipedia.org/wiki/2021_UA1">2021 UA1</a>. It came only a few thousand kilometres from Earth, over the Antarctic. In cosmic terms, this is uncomfortably close. However, 2021 UA1 was only two metres across, and therefore posed no substantial risk.</p> <p>There are likely hundreds of millions of objects of this size in our Solar System, and it’s not uncommon for them to impact Earth. In these cases, most of the object burns up in the atmosphere and creates a spectacular light show, with little risk to life.</p> <p>In 2019 another <a href="https://theconversation.com/an-asteroid-just-buzzed-past-earth-and-we-barely-noticed-in-time-120972">asteroid</a> with a 100m diameter passed Earth some 70,000km away. It was publicly announced mere hours before it flew past. While it wasn’t as close, it was of a much more concerning size.</p> <p>These near misses reiterate how important it is for us to speed up the search for near-Earth objects.</p> <p><strong>Blind spots</strong></p> <p>The reason we haven’t already found every object that could one day pass nearby Earth is largely because of observational blind spots, and the fact we can’t observe all parts of the sky all the time.</p> <p>To find 2022 AP7, Sheppard and colleagues used a telescope at twilight soon after the Sun had set. They had to do this because they were looking for asteroids in the vicinity of Venus and Earth. Venus is currently on the <a href="https://theskylive.com/where-is-venus">other side of the Sun</a> to Earth.</p> <p>Making observations close to the Sun is difficult. The Sun’s glare overwhelms the weak light reflected off small asteroids – presenting a blind spot. But just before and after sunset, there’s a small window in which the Sun’s glare no longer blocks the view.</p> <p>Right now there are only about 25 asteroids known to have well-determined orbits that lie entirely within Earth’s orbit. More are likely to be discovered, and these may contribute significantly to the missing 5% of potentially hazardous asteroids.</p> <p><strong>The Near-Earth Object Surveyor</strong></p> <p>A recent NASA mission spectacularly demonstrated that humans can purposefully change the trajectory of an asteroid. NASA’s DART (<a href="https://www.nasa.gov/planetarydefense/dart/dart-news">Double Asteroid Redirection Test</a>) mission collided a vending-machine-sized spacecraft into a 160m diameter minor-planet moon called Dimorphos.</p> <figure class="align-center "><img src="https://images.theconversation.com/files/492925/original/file-20221102-28436-f16d5x.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/492925/original/file-20221102-28436-f16d5x.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=338&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/492925/original/file-20221102-28436-f16d5x.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=338&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/492925/original/file-20221102-28436-f16d5x.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=338&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/492925/original/file-20221102-28436-f16d5x.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=424&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/492925/original/file-20221102-28436-f16d5x.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=424&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/492925/original/file-20221102-28436-f16d5x.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=424&amp;fit=crop&amp;dpr=3 2262w" alt="" /><figcaption><span class="caption">The DART spacecraft successfully collided with Dimorphos, which itself was orbiting a larger asteroid named Didymos.</span> <span class="attribution">NASA/Johns Hopkins APL/Steve Gribben</span></figcaption></figure> <p>The collision altered Dimorphos’s 12-hour orbital period by more than 30 minutes, and was declared a resounding success. So it’s plausible for humans to redirect a hazardous asteroid if we find one.</p> <p>That said, we’d have to find it well in advance. Potentially hazardous asteroids are much larger than Dimorphos, so a bigger collision would be required with plenty of lead time.</p> <p>To do this, NASA has plans to survey for potentially hazardous objects using a telescope in space. Its <a href="https://www.jpl.nasa.gov/missions/near-earth-object-surveyor">Near-Earth Object (NEO) Surveyor</a>, scheduled to launch in 2026, will be able to survey the Solar System very efficiently – including within blind spots caused by the Sun.</p> <p>That’s because the glare we see while observing from Earth is caused by Earth’s atmosphere. But in space there’s no atmosphere to look through.</p> <figure class="align-center "><img src="https://images.theconversation.com/files/492932/original/file-20221102-26-zoxo13.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;fit=clip" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px" srcset="https://images.theconversation.com/files/492932/original/file-20221102-26-zoxo13.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=600&amp;h=363&amp;fit=crop&amp;dpr=1 600w, https://images.theconversation.com/files/492932/original/file-20221102-26-zoxo13.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=600&amp;h=363&amp;fit=crop&amp;dpr=2 1200w, https://images.theconversation.com/files/492932/original/file-20221102-26-zoxo13.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=600&amp;h=363&amp;fit=crop&amp;dpr=3 1800w, https://images.theconversation.com/files/492932/original/file-20221102-26-zoxo13.jpg?ixlib=rb-1.1.0&amp;q=45&amp;auto=format&amp;w=754&amp;h=457&amp;fit=crop&amp;dpr=1 754w, https://images.theconversation.com/files/492932/original/file-20221102-26-zoxo13.jpg?ixlib=rb-1.1.0&amp;q=30&amp;auto=format&amp;w=754&amp;h=457&amp;fit=crop&amp;dpr=2 1508w, https://images.theconversation.com/files/492932/original/file-20221102-26-zoxo13.jpg?ixlib=rb-1.1.0&amp;q=15&amp;auto=format&amp;w=754&amp;h=457&amp;fit=crop&amp;dpr=3 2262w" alt="" /><figcaption><span class="caption">The NEO Surveyor spacecraft won’t have the issue of observational blind spots when hunting for asteroids.</span> <span class="attribution">NASA/JPL/University of Arizona</span></figcaption></figure> <p>It’s very likely the Near-Earth Object Surveyor will reveal new objects, and help us characterise a large number of objects to greatly improve our understanding of threats.</p> <p>The key is to find as many objects as possible, categorise them, track the risks, and plan a redirection mission as much in advance as possible. The fact that all of these elements of planetary defence are now a reality is an amazing feat of science and engineering. It is the first time in human history we have these capabilities.<img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/193709/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /></p> <p><em>Writen by Steven Tingay. Republished with permission from <a href="https://theconversation.com/astronomers-have-detected-another-planet-killer-asteroid-could-we-miss-one-coming-our-way-193709" target="_blank" rel="noopener">The Conversation</a>.</em></p> <p><em>Image: </em><em>DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA/J. da Silva/Spaceengine</em></p>

Technology

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Why ‘best before’ food labelling is not best for the planet or your budget

<p>UK supermarkets have <a href="https://metro.co.uk/2022/08/03/which-supermarkets-are-scrapping-best-before-dates-and-why-17117556/">removed “best before” dates</a> on thousands of fresh food products in an effort to reduce food waste.</p> <p>One of the major supermarket chains, Sainsbury’s, is replacing these labels with product messaging that says “<a href="https://www.fruitnet.com/fresh-produce-journal/sainsburys-axes-best-before-dates-on-more-fruit-and-veg/247057.article">no date helps reduce waste</a>”.</p> <p>Apples, bananas, potatoes, cucumbers and broccoli are among the most wasted foods. Removing “best before” labels from these foods alone will reduce waste by an estimated <a href="https://wrap.org.uk/taking-action/food-drink/initiatives/food-waste-reduction-roadmap">50,000 tonnes a year</a>.</p> <p>In Australia we produce <a href="https://www.fial.com.au/sharing-knowledge/food-waste">7.6 million tonnes of food waste every year</a> – about 300kg per person. <a href="https://workdrive.zohopublic.com.au/external/ba011474a921ef40d77287a482fc9b257083a646708e3b38b6debeea81cdf81b">About 70%</a> of what we throw out is still edible. Why aren’t we following the UK’s example?</p> <p> </p> <p>Some might worry about food safety. But two types of date labels – “best before” and “use by” – are used in Australia. “Use by” labels would still alert us to when food can no longer be regarded as safe to eat.</p> <p>And consumers will still be able to assess the state of fresh produce for themselves.</p> <h2>Food waste has huge impacts</h2> <p>Food waste costs Australia <a href="https://workdrive.zohopublic.com.au/external/ba011474a921ef40d77287a482fc9b257083a646708e3b38b6debeea81cdf81b">A$36.6 billion a year</a>.</p> <p>This waste occurs right across the supply chain, including primary production, manufacturing, distribution, retail and hospitality. However, households produce more than half of the waste, at an average cost per household of A$2,000 to $2,500 a year.</p> <p> </p> <p>In 2017, the Australian government <a href="https://www.dcceew.gov.au/environment/protection/waste/food-waste?state=tas#national-food-waste-strategy">pledged to halve food waste</a> by 2030 when it launched the <a href="https://www.dcceew.gov.au/environment/protection/waste/publications/national-food-waste-strategy">National Food Waste Strategy</a>.</p> <p>This is a complex issue, but one simple solution could be to follow the UK and remove “best before” dates.</p> <h2>How will you know if food is still safe?</h2> <p>Our labelling system is fairly straightforward, but many consumers don’t understand the difference between “best before” and “use by”. This confusion leads them to throw away tonnes of food that’s still suitable for eating.</p> <p>In Australia, the regulatory authority <a href="https://www.foodstandards.gov.au/consumer/labelling/dates/Pages/default.aspx">Food Standards</a> provides guidance for manufacturers, retailers and consumers on using dates on product labels. These dates indicate how long food products can be sold, and kept, before they deteriorate or become unsafe to eat.</p> <p>Food with a “best before” date can be legally sold and consumed after that date. These products should be safe, but may have lost some of their quality.</p> <p>Products past their “use by date” are considered not safe.</p> <p>The food supplier is responsible for placing date labels on the product.</p> <p>Differences in packaging and date labelling can be subtle. For example, lettuce sold loose or in an open plastic sleeve does not have a “best before” date. The same lettuce packaged in a sealed bag does.</p> <p>Bread is the only fresh food that uses a different system with “baked on” or “baked for” date labels.</p> <p>Some foods, such as canned goods and food with a shelf life of two years or more, don’t have to be labelled with “best before” dates because they usually retain their quality for many years. They are typically eaten well before they deteriorate.</p> <p>Food producers and retailers are keen to keep the labelling status quo, because it makes it easier to <a href="https://www.vox.com/22559293/food-waste-expiration-label-best-before">manage stock</a> and <a href="https://journals.sagepub.com/doi/full/10.1509/jppm.14.095">encourages turnover</a>.</p> <h2>The case for packaging</h2> <p>Some packaging is used to separate branded products such as fruit varieties protected by <a href="https://theconversation.com/the-case-of-the-pirated-blueberries-courts-flex-new-muscle-to-protect-plant-breeders-intellectual-property-126763">plant breeders’ rights</a>, organic products and imperfect vegetable ranges. Once packaged, these products require a “best before” date.</p> <p>Plastic packaging can greatly increase the shelf life of some vegetables. In these cases, it effectively reduces food waste. A striking example is cucumbers. Plastic wrap can extend their shelf life from a <a href="https://theconversation.com/why-some-plastic-packaging-is-necessary-to-prevent-food-waste-and-protect-the-environment-117479">few days to two weeks</a>.</p> <p>Vegetables such as broccoli and cauliflower contain beneficial anti-cancer compounds called <a href="https://www.frontiersin.org/articles/10.3389/fnut.2016.00024/full">glucosinolates</a>. Plastic packaging that seals in <a href="https://www.food-safety.com/articles/1324-naturally-preserving-food-with-gases">specialty gas</a> preserves these longer. However, overcooking quickly erases this packaging benefit.</p> <figure class="align-center "></figure> <h2>Dead or alive?</h2> <p>The chemistry of a fruit or vegetable starts changing the moment it is picked. Some types of produce, such as bananas and pears, are picked early so they ripen in the shop and at home. Other produce, such as sweet corn and peas, rapidly decline in the quality and quantity of flavours and nutrients once they’re picked. Snap freezing is an excellent way to preserve this produce.</p> <p>Fresh fruits and vegetables are still alive. Their cells remain full of chemical reactions and enzymatic activity.</p> <p>This is why a cut apple turns brown. It’s also why ethylene gas released from bananas and other fruits can shorten the life of their neighbours in the fruit bowl.</p> <p>Potatoes, one of the most wasted products, are sold with “best before” dates when packaged in plastic bags. But if stored correctly in low light and in a “breathable” bag (paper or hessian), potatoes stay “alive” and edible for months. Just make sure you cut away any green parts, which <a href="https://theconversation.com/can-you-really-be-poisoned-by-green-or-sprouting-potatoes-63437">contain toxic solanine</a>.</p> <p>As well as fresh produce’s own cellular activity, there is microbial activity in the form of bacteria and fungi.</p> <p>Fortunately, we come equipped with a number of evolved chemical sensors. We can <a href="https://theconversation.com/how-to-avoid-food-borne-illness-a-nutritionist-explains-153185">feel, see, sniff and taste</a> the state of fruits, vegetables and other products. Trust (and train) your instincts.</p> <h2>Questions to ask yourself</h2> <p>To reduce food waste, we need a combination of approaches, including appropriate packaging, sensible labelling and consumer awareness.</p> <p>Ideally, the <a href="https://www.foodstandards.gov.au/code/pages/default.aspx">Australian and New Zealand Food Standards Code</a> would be updated to reflect a more nuanced view of packaged fresh foods.</p> <p>In the short term, consumer awareness and buying power are the best drivers of change. Ask yourself questions like:</p> <ul> <li> <p>Do I need a packaged product?</p> </li> <li> <p>Does the packaging enhance shelf life?</p> </li> <li> <p>Would I buy less if it wasn’t packaged?</p> </li> </ul> <p>Thinking about these questions will help us reduce the impacts of food waste.<!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img style="border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important;" src="https://counter.theconversation.com/content/189686/count.gif?distributor=republish-lightbox-basic" alt="The Conversation" width="1" height="1" /><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https://theconversation.com/republishing-guidelines --></p> <p><a href="https://theconversation.com/profiles/louise-grimmer-212082">Louise Grimmer</a>, Senior Lecturer in Retail Marketing, <em><a href="https://theconversation.com/institutions/university-of-tasmania-888">University of Tasmania</a></em> and <a href="https://theconversation.com/profiles/nathan-kilah-599082">Nathan Kilah</a>, Senior Lecturer in Chemistry, <em><a href="https://theconversation.com/institutions/university-of-tasmania-888">University of Tasmania</a></em></p> <p>This article is republished from <a href="https://theconversation.com">The Conversation.</a> Read the <a href="https://theconversation.com/why-best-before-food-labelling-is-not-best-for-the-planet-or-your-budget-189686">original article</a>.</p> <p><em>Images: Getty</em></p>

Food & Wine

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"So proud": Blue Wiggle's daughter joins the cast

<p>The daughter of Blue Wiggle Anthony Field has shared she has joined the children's entertainment group as a dancer. </p> <p>Lucia Field, 17, made the announcement on her TikTok account, as she shared a throwback picture of her and her famous dad with Dorothy the Dinosaur. </p> <p>She wrote, "I never would've believed you if 16 years ago you told me I'd be here."</p> <p>She then shared a photo of her in a blue skivvy dancing in front of the giant Wiggles logo. </p> <p>The video, which was posted on the offical Wiggles account, was flooded with comments of people cheering on the new dance member. </p> <div class="embed" style="font-size: 16px; box-sizing: inherit; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; outline: none !important;"><iframe class="embedly-embed" style="box-sizing: inherit; margin: 0px; padding: 0px; border-width: 0px; vertical-align: baseline; width: 610px; max-width: 100%; outline: none !important;" title="tiktok embed" src="https://cdn.embedly.com/widgets/media.html?src=https%3A%2F%2Fwww.tiktok.com%2Fembed%2Fv2%2F7132666717473344769&amp;display_name=tiktok&amp;url=https%3A%2F%2Fwww.tiktok.com%2F%40thewiggles%2Fvideo%2F7132666717473344769%3Fis_copy_url%3D1%26is_from_webapp%3Dv1%26lang%3Den&amp;key=59e3ae3acaa649a5a98672932445e203&amp;type=text%2Fhtml&amp;schema=tiktok" width="340" height="700" frameborder="0" scrolling="no" allowfullscreen="allowfullscreen"></iframe></div> <p>Anthony also commented, saying he was "so proud" of his daughter.</p> <p>Lucia graduated from high school in December last year, with her excited father sharing a photo to Instagram of them together at her formal.</p> <p>In addition to Lucia, Anthony is father to daughter Marie, 16, and son Antonio, 14, whom he shares with his wife of 18 years, Michaela Patisteas.</p> <p>Anthony joined The Wiggles in 1979 alongside retired members Murray Cook, Greg Page and Jeff Fatt.</p> <p>The trio were replaced by 'Yellow Wiggle' Emma Watkins, who left the group in October last year, 'Purple Wiggle' Lachlan Gillespie and 'Red Wiggle' Simon Pryce.</p> <p><em>Image credits: TikTok</em></p>

Family & Pets

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Warming oceans may force New Zealand’s sperm and blue whales to shift to cooler southern waters

<p>The world’s oceans are absorbing more than <a href="https://www.un.org/en/climatechange/science/climate-issues/ocean-impacts" target="_blank" rel="noopener">90% of the excess heat and energy</a> generated by rising greenhouse gas emissions.</p> <p>But, as the oceans keep warming, rising sea temperatures generate unprecedented cascading effects that include the melting of polar ice, rising seas, marine heatwaves and ocean acidification.</p> <p>This in turn has profound impacts on marine biodiversity and the lives and livelihoods of coastal communities, especially in island nations such as New Zealand.</p> <p>In our latest <a href="https://www.sciencedirect.com/science/article/pii/S1470160X22007075?via%3Dihub" target="_blank" rel="noopener">research</a>, we focused on great whales – sperm and blue whales in particular. They are crucial for maintaining healthy marine ecosystems, but have limited options to respond to climate change: either adapt, die, or move to stay within optimal habitats.</p> <p>We used mathematical models to predict how they are likely to respond to warming seas by the end of the century. Our results show a clear southward shift for both species, mostly driven by rising temperatures at the sea surface.</p> <h2>Computing the fate of whales</h2> <p>Data on the local abundance of both whales species are <a href="https://www.int-res.com/abstracts/meps/v690/p201-217/" target="_blank" rel="noopener">deficient</a>, but modelling provides a powerful tool to predict how their range is likely to shift.</p> <p>We used a <a href="http://macroecointern.dk/pdf-reprints/AraujoNew2007.pdf" target="_blank" rel="noopener">combination of mathematical models</a> (known as correlative species distribution models) to predict the future range shifts of these whale species as a response to three future climate change scenarios of differing severity, as outlined by the Intergovernmental Panel on Climate Change (<a href="https://www.ipcc.ch/" target="_blank" rel="noopener">IPCC</a>).</p> <p>We applied these models, using the whales’ present distributions, to build a set of environmental “rules” that dictate where each species can live. Using climate-dependent data such as sea-surface temperature and chlorophyll A (a measure of phytoplankton growth), as well as static data such as water depth and distance to shore, we applied these rules to forecast future habitat suitability.</p> <p>We chose a scenario of “<a href="https://www.nature.com/articles/d41586-020-00177-3" target="_blank" rel="noopener">modest</a>” response to cutting greenhouse gas emissions (the IPCC’s mitigation strategy RCP4.5), which is the most likely given the current policies, and a worst-case scenario (no policy to cut emissions, RCP8.5), assuming the reality will likely be somewhere between the two.</p> <p>Our projections suggest current habitats in the ocean around the North Island may become unsuitable if sea-surface temperatures continue to rise.</p> <p>These range shifts become even stronger with increasing severity of climate change. For sperm whales, which are currently abundant off Kaikōura where they support eco-tourism businesses, the predicted distribution changes are even more evident than for blue whales, depending on the climate change scenario.</p> <p>While our results do not predict an overall reduction in suitable habitat that would lead to local extinctions, the latitudinal range shifts are nevertheless bound to have important ecological consequences for New Zealand’s marine ecosystems and the people who depend on them.</p> <h2>How whales maintain ecosystems</h2> <p>Great whales are marine ecosystem engineers. They modify their habitats (or create new ones), to suit their needs. In fact, these activities create conditions that other species rely on to survive.</p> <p>They engineer their environment on several fronts. By feeding in one place and releasing their faeces in another, whales convey minerals and other nutrients such as nitrogen and iron from the deep water to the surface, as well as across regions. This process, known as a “<a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0013255" target="_blank" rel="noopener">whale pump</a>”, makes these nutrients available for phytoplankton and other organisms to grow.</p> <p>This is very important because phytoplankton contributes about <a href="https://education.nationalgeographic.org/resource/plankton-revealed" target="_blank" rel="noopener">half of all oxygen to the atmosphere</a> and also captures <a href="https://www.imf.org/Publications/fandd/issues/2019/12/natures-solution-to-climate-change-chami" target="_blank" rel="noopener">about 40% of all released carbon dioxide</a>. By helping the growth of phytoplankton, whales indirectly contribute to the <a href="https://theconversation.com/tiny-plankton-drive-processes-in-the-ocean-that-capture-twice-as-much-carbon-as-scientists-thought-136599" target="_blank" rel="noopener">natural ocean carbon sink</a>.</p> <p>On top of this, each great whale accumulates about <a href="https://www.arcticwwf.org/the-circle/stories/protecting-the-earth-by-protecting-whales/" target="_blank" rel="noopener">33 tonnes of carbon dioxide in their body</a>, which they take to the ocean floor when they die and their carcass sinks.</p> <p> </p> <figure></figure> <p> </p> <p>Ultimately, the impact of warming oceans on whale distribution is an additional stress factor on ecosystems already under pressure from wider threats, including acidification, pollution and over-exploitation.</p> <h2>A way forward to help whales</h2> <p>Sperm whales are the largest toothed whales (odontocetes) and deep-diving apex predators. They primarily feed on squid and fish that live near the bottom of the sea.</p> <p>Blue whales are baleen whales (mysticetes) and filter small organisms from the water. They feed at the surface on zooplankton, particularly dense krill schools along coastlines where cold water from the deep ocean rises toward the surface (so-called <a href="https://oceanservice.noaa.gov/facts/upwelling.html" target="_blank" rel="noopener">upwelling areas</a>).</p> <p>These differences in feeding habits lead to divergent responses to ocean warming. Blue whales show a more distinct southerly shift than sperm whales, particularly in the worst-case scenario, likely because they feed at the surface where ocean warming will be more exacerbated than in the deep sea.</p> <p>Both species have important foraging grounds off New Zealand which may be compromised in the future. Sperm whales are currently occurring regularly off Kaikōura, while blue whales forage in the South Taranaki Bight.</p> <p>Despite these ecological differences, our results show that some future suitable areas around the South Island and offshore islands are common to both species. These regions could be considered sanctuaries for both species to retreat to or expand their habitat in a warming world. This should warrant <a href="https://environment.govt.nz/assets/Publications/Files/Environmental-Report-Card-Marine-Areas-with-Legal-protection_0.pdf" target="_blank" rel="noopener">increased protection of these areas</a>.</p> <p><strong>This article originally appeared on <a href="https://theconversation.com/warming-oceans-may-force-new-zealands-sperm-and-blue-whales-to-shift-to-cooler-southern-waters-188522" target="_blank" rel="noopener">The Conversation</a>.</strong></p> <p><em>Image: Shutterstock</em></p>

Travel Trouble

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The planets are aligning and here’s how to see it

<p dir="ltr">For the first time in 18 years, five celestial bodies will be aligned in an event you’ll be able to see with your naked eye.</p> <p dir="ltr">Mercury, Venus, Mars, Jupiter and Saturn will be visible for most of June, with the <em><a href="https://www.australiangeographic.com.au/news/2022/05/get-ready-to-see-the-planets-align-in-australian-skies-this-june/" target="_blank" rel="noopener">Australian Geographic</a></em> reporting that 6am each morning (or 30 minutes before sunrise for <a href="https://www.newshub.co.nz/home/new-zealand/2022/06/planetary-alignment-to-dazzle-new-zealand-skies-this-month.html" target="_blank" rel="noopener">New Zealanders</a>) is the prime time to see them all aligned.</p> <p dir="ltr">“If you get up before sunrise, you will be able to spot Mercury closest to the eastern horizon followed by the bright Venus,” Auckland’s Stardome Observatory said in a statement.</p> <p dir="ltr">“Mars and Jupiter will be close together and high in the sky, while Saturn will be in the northern part of the sky.</p> <p><span id="docs-internal-guid-4b93900f-7fff-50c3-a092-2853127bb0d4"></span></p> <p dir="ltr">“The positions of each planet will slightly change every morning but they will all remain in the sky for the month.”</p> <blockquote class="instagram-media" style="background: #FFF; border: 0; border-radius: 3px; box-shadow: 0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width: 540px; min-width: 326px; padding: 0; width: calc(100% - 2px);" data-instgrm-captioned="" data-instgrm-permalink="https://www.instagram.com/p/CehKH8bB788/?utm_source=ig_embed&amp;utm_campaign=loading" data-instgrm-version="14"> <div style="padding: 16px;"> <div style="display: flex; flex-direction: row; align-items: center;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 40px; margin-right: 14px; width: 40px;"> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 100px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 60px;"> </div> </div> </div> <div style="padding: 19% 0;"> </div> <div style="display: block; height: 50px; margin: 0 auto 12px; width: 50px;"> </div> <div style="padding-top: 8px;"> <div style="color: #3897f0; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: 550; line-height: 18px;">View this post on Instagram</div> </div> <div style="padding: 12.5% 0;"> </div> <div style="display: flex; flex-direction: row; margin-bottom: 14px; align-items: center;"> <div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(0px) translateY(7px);"> </div> <div style="background-color: #f4f4f4; height: 12.5px; transform: rotate(-45deg) translateX(3px) translateY(1px); width: 12.5px; flex-grow: 0; margin-right: 14px; margin-left: 2px;"> </div> <div style="background-color: #f4f4f4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(9px) translateY(-18px);"> </div> </div> <div style="margin-left: 8px;"> <div style="background-color: #f4f4f4; border-radius: 50%; flex-grow: 0; height: 20px; width: 20px;"> </div> <div style="width: 0; height: 0; border-top: 2px solid transparent; border-left: 6px solid #f4f4f4; border-bottom: 2px solid transparent; transform: translateX(16px) translateY(-4px) rotate(30deg);"> </div> </div> <div style="margin-left: auto;"> <div style="width: 0px; border-top: 8px solid #F4F4F4; border-right: 8px solid transparent; transform: translateY(16px);"> </div> <div style="background-color: #f4f4f4; flex-grow: 0; height: 12px; width: 16px; transform: translateY(-4px);"> </div> <div style="width: 0; height: 0; border-top: 8px solid #F4F4F4; border-left: 8px solid transparent; transform: translateY(-4px) translateX(8px);"> </div> </div> </div> <div style="display: flex; flex-direction: column; flex-grow: 1; justify-content: center; margin-bottom: 24px;"> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 224px;"> </div> <div style="background-color: #f4f4f4; border-radius: 4px; flex-grow: 0; height: 14px; width: 144px;"> </div> </div> <p style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; line-height: 17px; margin-bottom: 0; margin-top: 8px; overflow: hidden; padding: 8px 0 7px; text-align: center; text-overflow: ellipsis; white-space: nowrap;"><a style="color: #c9c8cd; font-family: Arial,sans-serif; font-size: 14px; font-style: normal; font-weight: normal; line-height: 17px; text-decoration: none;" href="https://www.instagram.com/p/CehKH8bB788/?utm_source=ig_embed&amp;utm_campaign=loading" target="_blank" rel="noopener">A post shared by Stardome (@stardome_nz)</a></p> </div> </blockquote> <p dir="ltr">Between June 9-27, the Moon will also be passing near each of the planets, making it easier to see each planet on these dates: </p> <ul> <li dir="ltr" aria-level="1"> <p dir="ltr" role="presentation">June 9 - Saturn</p> </li> <li dir="ltr" aria-level="1"> <p dir="ltr" role="presentation">June 22 - Jupiter</p> </li> <li dir="ltr" aria-level="1"> <p dir="ltr" role="presentation">June 23 - Mars</p> </li> <li dir="ltr" aria-level="1"> <p dir="ltr" role="presentation">June 26 - Venus</p> </li> <li dir="ltr" aria-level="1"> <p dir="ltr" role="presentation">June 27 - Mercury</p> </li> </ul> <p dir="ltr">If the conditions are just right, we might also get the chance to spot Uranus on June 25 - though you’ll need a pair of binoculars to catch the distinctly green-coloured dot to the right of the crescent Moon.</p> <p dir="ltr"><span id="docs-internal-guid-92a81228-7fff-672d-e592-49f9c48787a2"></span></p> <p dir="ltr"><em>Image: NASA / JPL-Caltech</em></p>

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