Vol. 201 No. 5

Reviews & Previews

Science Visualized

Notebook

Features

More Stories from the March 12, 2022 issue

  1. an aerial view of a forest
    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.

    By
  2. photo of a woman holding a baby
    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.

    By
  3. a grayscale photo of the surface of Venus against a backdrop of stars
    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.

    By
  4. a photo of a person in a hyperbaric chamber
    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.

    By
  5. images of adult and juvenile pterosaur fossils with arrows pointing to fossilized gastric pellets
    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.

    By
  6. microscope image of Haemophilus influenzae type b bacteria
    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.

    By
  7. a group of Arctic sponges
    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.

    By
  8. illustration of Earth's core structure showing the mantle in read, the outer core in yellow, and the inner core as a yellow sphere
    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.

    By
  9. illustration of sauropod dinosaurs
    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.

    By
  10. illustration of a hot Jupiter orbiting a star
    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.

    By
  11. image of a stone point with a sharp edge
    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.

    By