Vol. 203 No. 5

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Features

More Stories from the March 11, 2023 issue

  1. Three up close photos of index fingers with purple lines drawn on each to show their fingerprint shape. The first on the left shows the arch shape, the second in the middle shows the loop shape and the third on the right shows the whorl shape.
    Health & Medicine

    How fingerprints form was a mystery — until now

    A theory proposed by British mathematician Alan Turing in the 1950s helps explain how fingerprint patterns such as arches and whorls arise.

    By
  2. A newfound frog, Hyperolius ukaguruensis, which is a mxi of gold and green, looking upwards as it sits on a leaf
    Animals

    A newfound ‘croakless’ frog may communicate via touch

    A newly discovered frog species in Tanzania joins a rare group of frogs that don’t croak or ribbit.

    By
  3. A closeup photo of a large icicle with others hanging out of focus in the background.
    Physics

    Here’s why icicles made from pure water don’t form ripples

    A new study explains why icicles made from pure water have irregular shapes rather than the ripples typical of the salty icicles found in nature.

    By
  4. An orange and gray Australian painted lady sitting atop a bright magenta flower.
    Life

    76 percent of well-known insects fall outside protected areas

    Protected areas can provide safe havens for insects, but many existing ones fall short, a new study finds.

    By
  5. composite image of stone tool artifacts on a black background
    Anthropology

    Hominids used stone tool kits to butcher animals earlier than once thought

    Finds in Kenya push Oldowan tool use back to around 2.9 million years ago, roughly 300,000 years earlier than previous evidence.

    By
  6. A microscope image of a nerve cell with colors highlighting special receptors.
    Health & Medicine

    Psychedelics may improve mental health by getting inside nerve cells

    Psychedelics can get inside neurons, causing them to grow. This might underlie the drugs’ potential in combatting mental health disorders.

    By
  7. A photo of a researchers camp on Antarctica's Thwaites Glacier.
    Climate

    Rapid melting is eroding vulnerable cracks in Thwaites Glacier’s underbelly

    Thwaites is melting slower than thought, but the worst of it is concentrated in underbelly cracks, threatening the Antarctica glacier’s stability.

    By
  8. An opaque photo of a wildfire overtop an opaque satellite image of Africa.
    Climate

    Climate ‘teleconnections’ may link droughts and fires across continents

    Far-reaching climate patterns like the El Niño-Southern Oscillation may synchronize droughts and regulate scorching of much of Earth’s burned area.

    By
  9. A red and blue magnet bar on a background of metal shavings with the nearby shavings attracted to the ends of the magnet.
    Physics

    The standard model of particle physics passed one of its strictest tests yet

    An experiment with a single electron, trapped for months on end, produced one of the most precise tests yet of the standard model of particle physics.

    By
  10. An illustration of the dwarf planet Quaoar.
    Astronomy

    The Kuiper Belt’s dwarf planet Quaoar hosts an impossible ring

    Quaoar’s ring lies outside the Roche limit, an imaginary line beyond which rings aren’t thought to be stable.

    By
  11. A photo of a white cockatoo flying towards a clear glass box with a cashew hiding behind a thin piece of paper.
    Animals

    Cockatoos can tell when they need more than one tool to swipe a snack

    Cockatoos know when it will take a stick and a straw to nab a nut in a puzzle box. The birds join chimps as the only known nonhumans to use a tool kit.

    By
  12. A photo of a bluestreak cleaner wrasse.
    Animals

    Fish can recognize themselves in photos, further evidence they may be self-aware

    Cleaner fish recognize themselves in mirrors and photos, suggesting that far more animals may be self-aware than previously thought.

    By
  13. An illustration of a large, predatory fish known as coelacanths and eel-like conodonts swimming in the ocean.
    Paleontology

    In the wake of history’s deadliest mass extinction, ocean life may have flourished

    Ocean life may have recovered in just a million years after the Permian-Triassic mass extinction, fossils from South China suggest.

    By