Vol. 162 No. #1

More Stories from the July 6, 2002 issue

  1. Health & Medicine

    Appetite-suppressing drug burns fat, too

    An experimental drug seems to assail obesity through dual biological actions.

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  2. Materials Science

    Spring in your step? The forces in cartilage

    Researchers are uncovering the role of molecular forces in cartilage's ability to resist compression.

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  3. Caregivers take heartfelt hit

    Older persons experience elevated systolic blood pressure for at least 1 year after a spouse with Alzheimer's disease enters a nursing-care facility or dies.

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  4. Agriculture

    Killer bees boost coffee yields

    Even self-pollinating coffee plants benefit substantially from visits by insect pollinators.

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  5. Physics

    Twice-charmed particles spotted?

    Exotic cousins of protons and neutrons known as doubly-charmed baryons may have made their laboratory debut.

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  6. Health & Medicine

    Hunger hormone gone awry?

    People with an inherited form of obesity caused by constant hunger pangs have higher-than-normal blood concentrations of ghrelin, a hormone believed to boost appetite.

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  7. Health & Medicine

    Sex, smell and appetite

    A study of sexual dysfunction in mutated mice may help explain the connection between smell and appetite.

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  8. Materials Science

    X Rays to Go: Carbon nanotubes could shrink machines

    A new type of X-ray machine operates at room temperature by producing X-ray-generating electrons with carbon nanotubes instead of traditional heated metal filaments.

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  9. Earth

    Teenage Holdup: Pollution may delay puberty

    A new study of adolescents suggests that widespread environmental pollutants such as PCBs and dioxins may delay sexual development.

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  10. Physics

    Heightened Resistance: Sharper shaft points to smaller bits

    Scientists have exploited a method for detecting the orientations of magnetic fields to achieve a remarkable leap in detector sensitivity.

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  11. Health & Medicine

    His-and-Her Hunger Pangs: Gender affects the brain’s response to food

    Men's and women's brains react differently to hunger, as well as to satiation.

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  12. The Eyes Have It: Newborns prefer faces with a direct gaze

    Only a few days after birth, babies already home in on faces that fix them with a direct gaze and devote less attention to faces with eyes that look to one side.

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  13. Paleontology

    Into the Gap: Fossil find stands on its own four legs

    A fossil originally misidentified as an ancient fish turns out to be the nearly intact remains of a four-limbed creature that lived during an extended period noted for its lack of fossils of land animals.

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  14. Humans

    Official Concern: U.N. weighs in on acrylamide toxicity

    A United Nations panel concluded that, in fried, grilled, and baked foods, the formation of acrylamide, a carcinogen and nerve poison in rodents, constitutes "a serious problem."

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  15. Tough Tradeoff: Beetle brains show how sex shortens life

    Brain surgery in beetles reveals yet another way that having sex can shorten life.

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  16. Aphids with Attitude

    A few aphid species that live socially in groups raise their own armies of teenage female clones.

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  17. Physics

    Double or Nothing

    The hunt for a rare, hypothetical nuclear transformation known as neutrinoless double-beta decay may answer one of the most urgent questions in physics today: How much do elementary particles called neutrinos weigh?

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