Vol. 163 No. #15 Archives

More Stories from the April 12, 2003 issue

  1. Health & Medicine

    Microbicide thwarts AIDS virus in monkey test

    A microbicidal gel applied vaginally prevents some transmission of the AIDS virus in monkeys.

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  2. Earth

    Mapping watersheds invites comparisons

    Computerized maps of environmental features for 154 of the largest river watersheds will soon be available to the public, free of charge.

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  3. Astronomy

    All-sky survey makes Internet debut

    An atlas of some 5 million images from the Two Micron All-Sky Survey is now available online.

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  4. Health & Medicine

    Weight-loss pill carries risks

    The drug ephedra and its presumed active ingredient, ephedrine, provide only modest weight-loss effects and pose health risks.

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  5. Chemistry

    Catnip repels pest

    Known to repel cockroaches and mosquitoes, catnip oil also works against termites.

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  6. Chemistry

    Nuclear-waste monitoring gets close to the source

    A new prototype device may make monitoring of radioactive contamination cheaper and easier.

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  7. Chemistry

    Matcha green tea packs the antioxidants

    A green tea used in Japanese tea ceremonies contains much more of a beneficial antioxidant than ordinary green tea.

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  8. Chemistry

    Contacts could dispense drugs

    Novel contact lens materials use nanoparticles to dispense drugs.

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  9. Physics

    Rare Events: Exotic processes probe the heart of matter

    Physicists have for the first time unambiguously detected and measured the rates of certain reactions among protons, neutrons, and simple atomic nuclei.

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  10. Astronomy

    Once Upon a Time in the Cosmos: Using distant galaxies to study the early universe

    Peering far back in time, two teams of astronomers report that they have found some of the universe's earliest galaxies.

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  11. Animals

    Costly Sexiness: All that flash puts birds at extra risk

    Distinctive his-and-her plumages increase the chance that a bird species will go extinct locally, according to an unusually far-ranging study.

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  12. Ecosystems

    At a Snail’s Place: Rock climbing cuts mollusk diversity

    As rock climbing soars in popularity, some cliff-side snail populations may be crashing.

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  13. Anthropology

    Cannibalism’s DNA Trail: Gene may signal ancient prion-disease outbreaks

    Cannibalism among prehistoric humans may have left lasting genetic marks.

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  14. Health & Medicine

    Deadly Stowaways: Seeds of cancer in transplant recipients are traced back to donors

    Precancerous cells that grow into Kaposi's sarcoma are sometimes introduced into a person in an organ transplant.

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  15. Putting Out the Welcome Mat: Chemical guides germ cells to gonads

    A chemical made in the gonads attracts the embryonic cells that will one day form eggs or sperm.

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  16. Tech

    Liberty’s smooth move

    Sensors clamped to the Liberty Bell's crack show that it could handle the stress of a move.

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  17. Ecosystems

    Cultivating Weeds

    Some formerly mild-mannered plants turn into horticultural bullies when planted far outside their native range.

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  18. Anthropology

    The Stone Masters

    Investigations of modern-day expert and novice craftsmen of stone tools and decorative stone beads offer insights into the making of stone implements thousands and perhaps even millions of years ago.

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