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  1. Archaeology

    Ancient stone-tool making method arose multiple times

    Hominids in both Africa and Eurasia independently invented a flake-tool technique hundreds of thousands of years ago, countering a long-held idea in archaeology.

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  2. Tech

    Solar cell powers water-to-hydrogen conversion

    High efficiency could make perovskite solar cells useful for generating environmentally friendly fuel.

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  3. Neuroscience

    Mighty muscles may stave off depression

    Strong muscles protect the brain from stress-induced toxin associated with depression, a study in mice suggests.

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  4. Science & Society

    Syria’s World Heritage Sites severely damaged by war

    Satellite images reveal that five of the country’s six World Heritage Sites have suffered damage and some structures have been completely destroyed.

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  5. Life

    Fledgling birds change rules for caterpillar color

    An unusual experiment shows that larvae lose the advantage of warning colors during the seasonal flush of naïve predators.

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  6. Animals

    Sneaky little giraffe weevils beat big rivals

    A little stealth gives smaller giraffe weevil males a leg up when competing with big ones for mates.

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  7. Health & Medicine

    Recovery time from surgery foretold

    Blood samples taken from patients after surgery might reveal who is destined for a quick rebound.

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  8. Health & Medicine

    More than 1 million Ebola cases may hit West Africa by January

    New projections of the outbreak suggest that without drastic improvements, weekly cases could increase from hundreds to thousands.

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  9. Astronomy

    Water found on Neptune-sized world

    Just four times as wide as Earth, HAT-P-11b is the smallest exoplanet known to store water in its atmosphere.

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  10. Cosmology

    Gravitational wave discovery gives way to Milky Way dust

    New polarization maps from the Planck satellite suggest that the BICEP2 announcement this year of primordial gravitational waves might be due entirely to dust in our galaxy.

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  11. Tech

    Hybrid robot merges flier with two snakelike machines

    A helicopter robot can airlift snakelike search-and-rescue bots out of tight situations.

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  12. Health & Medicine

    Statins may improve odds of surviving a bleeding stroke

    Common cholesterol-lowering drugs called statins may help people who have suffered a stroke caused by ruptured blood vessels.

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