1. iguana motionless after Florida cold snap

    How frigid lizards falling from trees revealed the reptiles’ growing cold tolerance

    Some Florida lizards’ ability to handle temperatures down to 5.5° C may provide clues to how they might deal with the extremes of climate change.

  2. macrophage and leukocytes
    Health & Medicine

    How two immune system chemicals may trigger COVID-19’s deadly cytokine storms

    A study in mice hints at drugs that could be helpful in treating severe coronavirus infections.

  3. scientists collecting cave samples

    The first Denisovan DNA outside Siberia unveils a long stint on the roof of the world

    Genetic evidence puts Denisovans, humankind’s now-extinct cousins, on the Tibetan Plateau from 100,000 to at least 60,000 years ago.

  4. Ogre-faced spider

    Ogre-faced spiders catch insects out of the air using sound instead of sight

    A new study finds that ogre-faced spiders can hear a surprisingly wide range of sounds.

  5. octopus in a coffee mug

    How octopuses ‘taste’ things by touching

    Octopus arms are dotted with cells that can "taste" by touch, which might enable arms to explore the seafloor without input from the brain.

  6. black hole merger illustrated

    LIGO and Virgo’s gravitational wave tally more than quadrupled in six months

    Scientists report 39 sets of spacetime ripples from just half a year of data.

  7. Venus
    Planetary Science

    Doubts over a ‘possible sign of life’ on Venus show how science works

    Detecting phosphine in Venus’ atmosphere made headlines, but reanalyses and new searches call into question the original discovery of the molecule.

  8. Atoms
    Quantum Physics

    Galileo’s famous gravity experiment holds up, even with individual atoms

    When dropped, two types of atoms accelerate at the same rate despite their differences, much like objects in Galileo’s leaning Tower of Pisa experiment.

  9. Mummified llama head from Inca sacrifices

    Mummified llamas yield new insights into Inca ritual sacrifices

    Bound and decorated llamas, found at an Inca site in southern Peru, may have been buried alive as part of events in annexed territories.

  10. hydrogen molecule

    A photon’s journey through a hydrogen molecule is the shortest event ever timed

    The shortest duration ever measured is 247 zeptoseconds, or trillionths of a billionth of a second.

  11. illuminated moon

    Water exists on sunny parts of the moon, scientists confirm

    New observations of the moon, made by a telescope flying onboard a Boeing 747-SP jet, have confirmed the presence of water on sunlit areas of the moon.

  12. Plasmodium falciparum

    How malaria parasites hide from the human immune system

    By turning genes on or off, the parasite keeps blood levels low but persistent, so infection doesn’t set off alarm bells for the immune system.