Humans

  1. Health & Medicine

    Scientists Say: Ectoparasite

    Many people think of parasites as organisms that live inside their hosts. But some of them can be found on the outside instead.

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  2. Fossils

    Ancient jaw suggests humans left Africa earlier than thought

    A fossil jaw found in a cave in Israel is at least 177,000 years old. The scientists who found it think it shows humans left Africa much earlier than thought.

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  3. Space

    En route to Mars, astronauts may face big health risks

    Going into space brings the thrill of a new frontier — and risks that scientists are racing to understand, from radiation to isolation.

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  4. Health & Medicine

    Yuck! Bedbug poop leaves lingering health risks

    Chemical residues left by bedbugs can persist, even when the pests have been eradicated. This may explain lingering allergic symptoms in cleaned up homes, a new study concludes.

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  5. Health & Medicine

    Scientists Say: CT scan

    Short for computerized tomography, this technique lets scientists and doctors see insides in detail.

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  6. Tech

    Human cells form the basis of this artificial eye

    Real or fake — you be the judge. Human cells were used to create this test bed for studying both the eye and eye-disease therapies.

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  7. Materials Science

    Hairy nanoparticles put viruses in a deadly embrace

    Current drugs can’t stop viruses for good. But newly developed hairy nanoparticles just might. They surround and put pressure on the viruses, which ultimately destroys them.

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  8. Health & Medicine

    Why many Olympic athletes have early birthdays

    When kids start out in sports, coaches tend to pick the biggest as the best. Here’s what scientists are trying to do about it.

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  9. Health & Medicine

    Scientists Say: Triclosan

    This chemical is known for its bacteria-killing skills. But its use can also promote the development of dangerous, antibiotic-resistant bacteria.

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  10. Health & Medicine

    Athletes’ head injuries can provoke surprisingly long-lasting harm

    Even as symptoms of an athletic head injury fade, the brain may remain impaired, new data show. The harm may last months — perhaps even a lifetime.

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  11. Health & Medicine

    Explainer: What is a concussion?

    A concussion is a severe type of head injury that can damage a brain for weeks to years — perhaps even a lifetime.

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  12. Brain

    Unlike adults, teens don’t perform better when the stakes are high

    Adults tend to do better on tasks that have bigger rewards. Not teens. This difference might have to do with the rewiring of the brain during adolescence, new data suggest.

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