1. image of Earth's atmosphere with the troposphere visible in orange

    Earth’s lower atmosphere is rising due to climate change

    In the Northern Hemisphere, the upper boundary of the troposphere, the slice of sky closest to the ground, rose 50 to 60 meters a decade from 1980 to 2020.

  2. illustration of the proposed HabEx space telescope

    Here’s what the next 10 years of space science could look like

    In the latest Astronomy and Astrophysics Decadal Survey, astronomers have their sights set on a whole fleet of next-generation space telescopes.

  3. hand holds a reconstruction of a Homo naledi child’s skull showing fossil teeth and parts of the cranium

    A child’s partial skull adds to the mystery of how Homo naledi treated the dead

    The isolated discovery of a Homo naledi child’s skull fragments and teeth plays into idea that small-brained species ritually placed the dead in caves.

  4. two humpback whales emerging from the ocean to feed

    Baleen whales eat (and poop) a lot more than we realized

    The sheer volume of food that some whales eat and then excrete suggests the animals shape ecosystems to a much larger degree than previously thought.

  5. illustration of two cars neutron stars colliding

    Neutron star collisions probably make more gold than other cosmic smashups

    Smashups of two neutron stars produce more heavy elements than when a black hole swallows a neutron star, calculations suggest.

  6. image of Pluto's dark side
    Planetary Science

    Pluto’s dark side reveals clues to its atmosphere and frost cycles

    Light from Pluto’s moon Charon illuminated the dwarf planet’s farside offering clues about how nitrogen cycles between its surface and its atmosphere.

  7. image of two galaxies, with an inset showing a bright spot

    A rush to watch a supernova exposed its last gasp before exploding

    By studying the final years of stars, scientists hope to find clues to help them recognize when other stars are about to blow.

  8. A white Nissan electric car with a charger stuck into the front
    Materials Science

    Lithium-ion batteries made with recycled materials can outlast newer counterparts

    Batteries with recycled cathodes outperformed batteries with new cathodes, lasting for thousands more charging cycles before their capacity waned.

  9. Mourning gecko

    Gene-edited stem cells help geckos regrow more perfect tails

    Regenerated gecko tails are a far cry from perfect. Now experiments have coaxed geckos to regrow better ones with nerve tissue and bonelike cartilage.

  10. Lydia Melo receiving a covid-19 vaccine shot
    Health & Medicine

    What parents need to know about Pfizer’s COVID-19 vaccine for kids ages 5 to 11

    Federal health officials authorized the Pfizer vaccine for this age group on October 29.

  11. image of a variety of bird eggs

    An elusive equation describing bird eggs of all shapes has been found at last

    A new mathematical equation describes bird eggs of all shapes found in nature, and it could have applications in food and agricultural research.

  12. image of Perseverance rover from above, landing on Mars
    Planetary Science

    What the Perseverance rover’s quiet landing reveals about meteor strikes on Mars

    InSight tried to detect seismic waves created by the arrival of its sister mission, helping scientists uncover how Mars absorbs energy from impacts.