Vol. 157 No. #21

More Stories from the May 20, 2000 issue

  1. Grade-Schoolers Grow into Sleep Loss

    By the sixth grade, many middle-class children may experience substantial sleep deprivation that has the potential to interfere with their ability to learn and pay attention.

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  2. Earth

    Prescribed fire burns out of control

    A fire set by the National Park Service to clear underbrush burned out of control, consuming more than 44,000 acres around Los Alamos, N.M.

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  3. Astronomy

    Astronomers rediscover long-lost asteroid

    After 89 years of playing a cosmic version of Where's Waldo?, astronomers have located a long-lost asteroid named Albert.

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  4. Health & Medicine

    Drug combination may fight breast cancer

    Retinoic acid, when combined with a drug that reverses a process called methylation in breast tumor cells, may awaken a key cancer-fighting gene.

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  5. Health & Medicine

    Two studies offer some cell-phone cautions

    A British review of research gave cell-phone safety a guarded endorsement, while new findings indicate that radiation from older cell phones can trigger a stress-response gene, at least in animals.

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  6. Bdelloids: No sex for over 40 million years

    Researchers find the strongest evidence yet for creatures that have evolved asexually for millions of years.

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  7. Humans

    Motor City hosts top science fair winners

    The 2000 Intel International Science and Engineering Fair winners were announced in Detroit.

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  8. Astronomy

    Galaxies shine light on dark matter

    Using a cosmic mirage known as gravitational lensing, astronomers have developed detailed maps of the distribution of dark matter, the invisible material believed to make up 90 percent of the mass of the universe.

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  9. Astronomy

    New views of Jovian moons

    The Galileo spacecraft has taken the highest-resolution images ever recorded of three of Jupiter's small, innermost moons.

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  10. Health & Medicine

    Waiting to exhale

    A breath test that measures the activity of an enzyme involved in breaking down drugs in a person's body may help doctors minimize side effects from potent drugs such as docetaxel.

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  11. Health & Medicine

    Nervous tics in the heart

    The irregular heartbeats sometimes triggered after a heart attack may be caused by abnormal nerve growth in heart tissue damaged by the attack.

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  12. Physics

    Electron cycling in quantum confines

    A lone electron zips around in the tightest circle allowed by quantum mechanics in an extraordinarily small, frigid cyclotron, potentially allowing scientists to nail down some fundamental constants of physics more precisely than ever before.

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  13. Physics

    Laser links segue to chemical bonds

    Light can knit matter together until other bonds take over, providing a potentially useful approach to building nanometer-scale structures and materials.

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  14. Red Snow, Green Snow

    It's truly spring when those last white drifts go technicolor as algae bloom in the snow.

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  15. Earth

    Hunting Prehistoric Hurricanes

    Storm-tossed sand offers a record of ancient cyclones.

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