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More Stories from the September 23, 2023 issue

  1. Three different retail packages of wegovy are displayed on a table using a narrow focus setting, so that only the middle package is in focus.
    Health & Medicine

    What we still don’t know about Wegovy’s effect on strokes and heart attacks

    A clinical trial suggests that semaglutide, a drug used to treat obesity and diabetes, may protect cardiovascular health in a broad group of people.

    By
  2. An illustration of COVID-19 particles
    Health & Medicine

    Health risks can persist at least 2 years after COVID-19, new data suggest

    U.S. veterans who tested positive for COVID-19 in 2020 remain at higher risk for many long COVID conditions, from heart disease to gastrointestinal issues.

    By
  3. photo of large leaves from a tropical plant taken from below the forest canopy
    Climate

    Some leaves in tropical forests may be getting too hot for photosynthesis

    Climate change may be forcing some tropical leaves to stop photosynthesis and die. It’s still unclear what effect this will have on entire forests.

    By
  4. Two emperor penguin chicks stand on the ice. One has buried his head in his soft fur, while the other appears to be nodding off.
    Climate

    Emperor penguins lost thousands of chicks to melting ice last year

    In 2022, groups of emperor penguins in western Antarctica lost almost all their chicks to receding sea ice, signaling the threat of climate change.

    By
  5. Two yellowish branches of a finger coral from the species Porites compressa are pictured.
    Animals

    Adult corals have been safely frozen and revived for the first time

    Chunks of living corals could be frozen for safekeeping and revived later to restore reef ecosystems that are withering in warming seas.

    By
  6. In this illustration of a supermassive black hole, rays of bright gas escape from the center of a disc-shaped gray cloud.
    Astronomy

    Active supermassive black holes may be rarer than previously thought

    A dearth of rapidly growing black holes in new James Webb telescope data raises questions about how these behemoths grow and influence their galaxies.

    By
  7. A photo of an excavated section of a platform at a pre-Inca site in Peru.
    Archaeology

    Pre-Inca people stomped salutes to their thunder god on a special dance floor

    Excavation of a drumlike platform in the Andes turned up a structure seemingly designed to absorb shocks and emit resonant sounds when stomped upon.

    By
  8. A photo of two Indigenous youth skinning a moose as part of a hunting camp in Alberta, Canada.
    Psychology

    An apology to Indigenous communities sparks a mental health rethink

    The leading U.S. psychological association pledged to embrace Indigenous approaches to healing, which requires rethinking how to address mental health.

    By
  9. Conventional thermal vision depicts this nighttime scene of a forest road in ghostly grays (top). A new AI-aided technology takes thermal data and creates a sharper image (bottom). The system adds color based on the objects detected, shading water blue, for example.
    Artificial Intelligence

    How artificial intelligence sharpens blurry thermal vision images

    A thermal imaging technique uses a special camera and AI to create clear images and accurately gauge distances of objects, even in pitch-blackness

    By
  10. Eliud Kipchoge spreads his arms in jubilation as he finishes a sub 2 hour unofficial marathon in Vienna.
    Physics

    How to run a marathon in under two hours

    Running between other people reduces air resistance. A new study identifies optimal positioning of such drafting formations. Watch out, marathon records.

    By
  11. An illustration of the convergence of two black holes and yellow gravitational waves rippling through space.
    Space

    Recoiling black holes could move at nearly one-tenth the speed of light

    Knowing black holes’ speed after being kicked by gravitational waves can reveal how much energy converging black holes can release.

    By