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  1. Tech

    Long after JFK assassination, gunshot forensics still limited

    The Warren Commission Report included the results of a neutron activation analysis test of Lee Harvey Oswald. But even that high-tech analysis can't distinguish the type of weapon fired.

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  2. Life

    Molecule boosts numbers of stem cells in umbilical cord blood

    A new molecule multiplies stem cells in umbilical cord blood. More blood-making stem cells could mean more effective transplants for people with blood cancers.

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  3. Earth

    Shrinking ancient sea may have spawned Sahara Desert

    The Saharan Desert probably formed 7 million years ago as the ancient Tethys Sea, the forerunner of the Mediterranean Sea, shrank.

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  4. Tech

    Octobot uses webbed arms to swim faster

    Octopus-inspired robot could one day help researchers observe underwater ecosystems.

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  5. Materials Science

    Making metamaterials ‘digital’ could simplify invisibility cloaks

    The digital world of 1s and 0s has inspired a simpler way to make complex metamaterials.

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  6. Life

    Artificial sweeteners may tip scales toward metabolic problems

    The artificial sweetener saccharin meddles with the gut’s microbial community, setting in motion metabolic changes associated with obesity and diabetes.

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  7. Anthropology

    Strategy, not habitat loss, leads chimps to kill rivals

    Human impacts on chimpanzees have not increased their violence.

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  8. Health & Medicine

    Sleep drunkenness might be common

    A new survey shows that about 15 percent of people sometimes wake up disoriented and confused, a condition called sleep drunkenness.

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  9. Astronomy

    Tweak to dark matter may explain Milky Way mystery

    Dark matter weakly interacting with light in the early universe might have prevented satellite galaxies from forming around Milky Way, astronomers propose.

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  10. Quantum Physics

    Three photons entangled, not just two

    Physicists have found a way to entangle a trio of photons, but it works only once in every quadrillion attempts.

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  11. Tech

    Hydrogen made using sunlight, cheap materials

    Photosynthesis-inspired fuel cell uses water to make hydrogen gas and could feature in next-generation cars.

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  12. Agriculture

    Drug-resistant staph can cling to farm workers for days

    Agricultural exposure to staph bacteria could threaten the health of laborers and people who live near farms, a study of pig farm workers suggests.

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