1. Health & Medicine

    New data suggest people aren’t getting reinfected with the coronavirus

    People who recover from COVID-19 but later test positive again for the coronavirus don’t carry infectious virus, a study finds.

  2. Fitness class
    Health & Medicine

    Indoor, high-intensity fitness classes may help spread the coronavirus

    As more U.S. states reopen and people return to public life, dance fitness classes in South Korea tell a cautionary tale.

  3. aerial photo of a freeway in Los Angeles

    Daily global CO2 emissions dropped dramatically as COVID-19 kept people home

    Daily carbon dioxide emissions in early April were 17 percent lower than average daily emissions for 2019, thanks to government policies to restrict the spread of the coronavirus.

  4. a marine parchment tube worm glows blue against a black background

    Here’s a clue to how this tube worm’s slime can glow blue for days

    Mucus oozed by a marine tube worm can glow for up to 72 hours. New results suggest that the light may sustain itself through some clever chemistry.

  5. lithium atoms confined in lasers
    Quantum Physics

    Physicists exploit a quantum rule to create a new kind of crystal

    Cold atoms can form crystals as a result of the Pauli exclusion principle.

  6. Experimental vaccine injection
    Health & Medicine

    Moderna’s COVID-19 vaccine stimulates an immune response in people

    An mRNA vaccine triggers the immune system to make as many virus-blocking antibodies as in people who have recovered from COVID-19, early data show.

  7. 16th century painting of a grim scene of death
    Science & Society

    Past plagues offer lessons for society after the coronavirus pandemic

    Starting with the Roman Empire, societies have often dealt resiliently with deadly pandemics.

  8. anchovy ancestor

    Saber-toothed anchovy relatives hunted in the sea 50 million years ago

    Unlike today’s plankton-eating anchovies with tiny teeth, ancient anchovy kin had lower jaw of sharp spikes paired with a single giant sabertooth.

  9. T cells
    Health & Medicine

    T cells may help COVID-19 patients — and people never exposed to the virus

    Researchers found certain immune cells that help the body fight off an infection in the blood of people who recovered from a coronavirus infection.

  10. The Scream painting

    Moisture, not light, explains why Munch’s ‘The Scream’ is deteriorating

    Edvard Munch’s 1910 “The Scream” is famous for its loud colors. New insight into paint preservation could keep those pigments from fading out.

  11. Malaria parasites

    Malaria parasites may have their own circadian rhythms

    Plasmodium parasites don’t depend on a host for an internal clock, studies suggest.

  12. Mauna Kea volcano

    Long-dormant volcano Mauna Kea has been quietly grumbling for decades

    Small, periodic earthquakes have happened every seven to 12 minutes for decades, but aren’t reason for alarm, a new study finds.