Vol. 160 No. #11

More Stories from the September 15, 2001 issue

  1. Astronomy

    X rays trace fierce stellar winds

    A high-resolution X-ray view of the Rosette nebula, a nearby star-forming region, has revealed for the first time that the stellar winds from massive stars heat surrounding gas to a scorching 6 million kelvins.

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  2. Planetary Science

    Galileo finds spires on Callisto

    The sharpest images ever taken of Jupiter's icy moon Callisto show a group of features never seen before on the remote body—icy, knoblike spires that show signs of slow but steady erosion.

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  3. Health & Medicine

    Placebos are dead, long live placebos

    A study provides new evidence for the placebo effect and suggests a mechanism through which placebos might benefit patients with Parkinson's disease.

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  4. Health & Medicine

    Painkillers may damage hearts

    A retrospective study suggests that commonly used painkillers called COX-2 inhibitors may slightly increase a person's risk of having a heart attack.

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  5. Embryo stem cells turned to blood

    Human embryonic stem cells may provide a new source of blood and bone marrow.

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  6. Homing in on a longevity gene

    A gene on chromosome 4 may help people live to an old age.

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  7. Brief diet alters gene activity

    Even a short-term diet may activate anti-aging genes.

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  8. Earth

    Scientists spy sixth undersea-vent ecology

    A new group of hydrothermal vents found in the Indian Ocean are populated by communities of organisms that differ significantly from other such groups of vent systems.

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  9. Anthropology

    Neandertals show ancient signs of caring

    A partial jaw unearthed in France indicates that Neandertals extensively cared for sick and infirm comrades beginning nearly 200,000 years ago.

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  10. Earth

    Bt Corn Risk to Monarchs Is ‘Negligible’

    A much-anticipated report states that the most commonly planted forms of genetically engineered Bt corn pose only a "negligible" risk to monarch butterfly populations.

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  11. Materials Science

    Speed demon gets hooked on silicon

    A method for coating silicon with high-performance semiconductors such as gallium arsenide may make faster, low-power microcircuits both cheaper and more widespread.

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  12. Materials Science

    Materials use nitric oxide to kill bacteria

    A novel coating may offer a new way to fend off microbial buildup on catheters, artificial hips, and replacement cardiac valves.

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  13. Ecosystems

    Fierce invader steals nests from a native fish

    The round goby, a Eurasian fish that has invaded the Great Lakes, is causing the decline of the mottled sculpin by displacing the native from its spawning sites.

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  14. Health & Medicine

    Two drugs may enhance recovery from stroke

    Two drugs, levodopa and dextroamphetamine, may help stroke patients to recover the ability to move and speak.

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  15. Earth

    Dusty workplace may cause change of heart

    Occupational exposure to fine dust can trigger adverse changes in the hearts of even strong, healthy workers.

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  16. Animals

    Social Cats

    Who says cats aren't social? And other musings from scientists who study cats in groups.

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  17. Earth

    Life on the Edge

    Will a mass extinction usher in a world of weeds and pests?

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