Vol. 206 No. 4
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More Stories from the September 7, 2024 issue

  1. Astronomy

    Some meteors leave trails lasting up to an hour. Now we may know why

    A new survey of meteors that leave persistent trails found that speed and brightness don’t matter as much as atmospheric chemistry.

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  2. Health & Medicine

    Why mpox is a global health emergency — again

    The WHO made the declaration as a potentially more infectious version of the deadly virus has emerged and mpox cases are rapidly rising across Africa.

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  3. Oceans

    This AI can predict ship-sinking ‘freak’ waves minutes in advance

    The model, which was trained on data from ocean buoys to identify potential rogue waves, could help save lives.

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  4. Animals

    This spider makes its home in the burrows of extinct giant ground sloths

    Caves made by extinct giant ground sloths make the perfect home for a newly discovered type of long-spinneret ground spider from Brazil.

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  5. Health & Medicine

    Your medications might make it harder for you to beat the heat

    Chronic illnesses and the medications that treat them may make it harder to handle extreme heat. It’s even harder to study how.

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  6. Animals

    Hundreds of snake species get a new origin story

    Elapoid snakes, including cobras, mambas and sea snakes, may have evolved in Asia, not Africa as many researchers once thought.

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  7. Environment

    More than 4 billion people may not have access to clean water

    The new estimate, based on data from 135 low- and middle-income countries, is more than double the World Health Organization’s official count.

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  8. Paleontology

    The asteroid that may have killed the dinosaurs came from beyond Jupiter

    The Chicxulub crater, left behind by the impact, contains elemental traces that suggest the origins of the notorious projectile.

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  9. Anthropology

    An Egyptian mummy’s silent ‘scream’ might have been fixed at death

    A rare muscle-stiffening reaction could explain the open-mouthed expression of a mummy known as the Screaming Woman, scientists suggest.

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  10. Neuroscience

    Alzheimer’s blood tests are getting better, but still have a ways to go

    Blood biomarker tests could help doctors know if a person's cognitive symptoms are due to Alzheimer's or something else.

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  11. Climate

    Earth’s jet stream helps create the seeds of clouds

    The newly discovered process for making aerosols might also be the most productive.

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  12. Archaeology

    Was Egypt’s first pyramid built with hydraulics? The theory may hold water

    A controversial analysis contends that ancient engineers designed a water-powered elevator to hoist stones for King Djoser’s pyramid.

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  13. Climate

    Record-breaking Coral Sea temperatures threaten the Great Barrier Reef

    Near-annual extreme heat in the Coral Sea, including in 2024, is causing back-to-back mass bleaching events in the iconic Great Barrier Reef.

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  14. Health & Medicine

    50 years ago, some of plastic’s toxic hazards were exposed

    Worker exposure to vinyl chloride became tightly regulated after the chemical was linked with liver cancer. Now, its use may be on the chopping block.

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