1. Space rocks hitting Earth illustration
    Planetary Science

    Ribose, a sugar needed for life, has been detected in meteorites

    Samples of rocks that fell to Earth contain a key molecular ingredient of RNA, part of life’s genetic machinery.

  2. Nazca Line

    An AI found a hidden Nazca Line in Peru showing a humanoid figure

    An artificial intelligence program designed to go through massive datasets for hints of ancient geoglyphs called Nazca Lines has discovered a new one.

  3. Climate

    The loss of ‘eternal ice’ threatens Mongolian reindeer herders’ way of life

    Mongolian reindeer herders help scientists piece together the loss of the region’s vital “eternal ice” patches.

  4. Exploding star illustration

    How two gamma-ray bursts created record-breaking high-energy photons

    Light packing up to 1 trillion electron volts of energy bolsters a theory for how these cosmic explosions produce such high-energy radiation.

  5. Mosquito control worker in Brazil
    Health & Medicine

    Dengue cases in the Americas have reached an all-time high

    There have been more dengue cases in the Americas this year than ever before, according to the Pan American Health Organization.

  6. half of a brain

    Some people with half a brain have extra strong neural connections

    Brain scans of six people who had half their brains removed as epileptic children show signs of compensation.

  7. Caribou herd

    Caribou migrate farther than any other known land animal

    Caribou in Alaska and Canada migrate up to 1,350 kilometers round trip each year, a study reports.

  8. mouse intestine
    Health & Medicine

    Full intestines, more than full stomachs, may tell mice to stop eating

    A new description of stretch-sensing nerve endings in mice’s intestines could lead to ways to treat obesity.

  9. Humpback whale

    Humpback whales in the South Atlantic have recovered from near-extinction

    A new count shows the population off Brazil went from about 450 in the 1950s to some 25,000 today.

  10. lead
    Materials Science

    Lead becomes stronger than steel under extreme pressures

    Lead is a soft metal, easily scratched with a fingernail. But that changes dramatically when the metal is compressed under high pressures.

  11. kids holding trees to plant

    5 things to know about fighting climate change by planting trees

    One group’s idea of planting vast swaths of trees to curb climate change exaggerates the proposal’s power to trap carbon, some argue.

  12. solar spicules

    Realigning magnetic fields may drive the sun’s spiky plasma tendrils

    Solar spicules emerge near counterpointing magnetic fields, hinting that self-adjusting magnetism creates these filaments, which may heat the corona.