Vol. 201 No. 5
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More Stories from the March 12, 2022 issue

  1. Plants

    Earth may have 9,200 more tree species than previously thought

    Estimating how many tree species are on Earth is an important step for forest conservation and protecting biodiversity.

  2. Health & Medicine

    Chewing sugar-free gum reduced preterm births in a large study

    Among 10,000 women in Malawi, those who chewed xylitol gum daily had fewer preterm births compared with women who didn’t chew the gum.

  3. Planetary Science

    These are the first visible-light images of Venus’ surface captured from space

    Cameras aboard NASA’s Parker Solar Probe managed to peer through Venus’ thick clouds to photograph the planet’s surface.

  4. Health & Medicine

    50 years ago, oxygen was touted as a potential memory loss treatment

    In 1972, researchers were studying whether hyperbaric chambers could help reverse senility. Today, science is still piecing together clues.

  5. Paleontology

    Fossils reveal that pterosaurs puked pellets

    Fish scale–filled pellets found by two pterosaurs are the first fossil evidence the flying reptiles regurgitated undigestible food, like some modern birds.

  6. Health & Medicine

    A deadly bacteria has been infecting children for more than 1,400 years

    DNA from a 6th century boy’s tooth reveals signs of the earliest known Haemophilus influenzae type b infection, shedding light on the pathogen’s history.

  7. Animals

    Deep-sea Arctic sponges feed on fossilized organisms to survive

    Slow-moving sponges, living deep in the Arctic Ocean where no currents deliver food, scavenge a carpet of long-dead critters.

  8. Earth

    Weird ‘superionic’ matter could make up Earth’s inner core

    Computer simulations suggest that matter that behaves like a mash-up of solid and liquid could explain oddities of Earth’s center.

  9. Paleontology

    Fossils reveal what may be the oldest known case of the dino sniffles

    A respiratory infection that spread to air sacs in the vertebrae of a 150-million-year-old sauropod likely led to now-fossilized bone lesions.

  10. Astronomy

    How ‘hot Jupiters’ may get their weirdly tight orbits

    Gravitational kicks from other planets and stars can send giant worlds into orbits that bring them close to their suns.

  11. Archaeology

    Homo sapiens may have reached Europe 10,000 years earlier than previously thought

    Archaeological finds in an ancient French rock-shelter suggest migrations to the continent started long before Neandertals died out.