Vol. 203 No. 4
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More Stories from the February 25, 2023 issue

  1. Life

    A new metric of extinction risk considers how cultures care for species

    Conservation efforts should consider relationships between cultural groups and the species important to them, researchers argue.

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  2. Health & Medicine

    The deadly VEXAS syndrome is more common than doctors thought

    The recently discovered inflammatory disease, VEXAS syndrome, typically occurs in men over 50, affecting nearly 1 in 4,000 in the United States.

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  3. Animals

    Are your cats having fun or fighting? Here are some ways to tell

    Certain behaviors indicate if your cats’ interaction is friendly, aggressive or something in between, a new study finds.

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  4. Archaeology

    Chemical residue reveals ancient Egyptians’ mummy-making mixtures

    Chemical clues in embalming vessels reveal previously unknown ingredients used to prepare bodies for mummification and their far-flung origins.

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  5. Earth

    Earth’s inner core may be reversing its rotation

    In the past 13 years, the rotation of the planet’s solid inner core may have temporarily stopped and then started to reverse direction.

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  6. Materials Science

    These shape-shifting devices melt and re-form thanks to magnetic fields

    Miniature machines made of gallium embedded with magnetic particles can switch between solid and liquid states.

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  7. Planetary Science

    Enceladus is blanketed in a thick layer of snow

    Pits on the Saturnian moon reveal the surprising depth of the satellite’s snow, suggesting its plume was more active in the past.

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  8. Physics

    Water is weird. A new type of ice could help us understand why

    A newfound type of amorphous ice with a density close to liquid water could help scientists make sense of water’s quirks.

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  9. Life

    Fossils suggest early primates lived in a once-swampy Arctic

    Teeth and jawbones found on Ellesmere Island, Canada, suggest that two early primate species migrated there 52 million years ago.

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  10. Life

    How plant ‘muscles’ fold up a mimosa leaf fast

    A mimosa plant revs up tiny clumps of specially shaped cells that collapse its leaflets, though why isn’t clear.

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  11. Health & Medicine

    Procrastination may harm your health. Here’s what you can do

    Scientists have tied procrastination to mental and physical health problems. But don't panic if you haven't started your New Year's resolutions yet.

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  12. Animals

    Prairie voles can find partners just fine without the ‘love hormone’ oxytocin

    Researchers knocked out prairie voles’ oxytocin detection system. They weren’t expecting what happened next.

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