Vol. 162 No. #6

More Stories from the August 10, 2002 issue

  1. Materials Science

    New gel could lead to cartilage repair

    A new scaffold material that contains cartilage cells and encourages their growth could help scientists create living tissue replacements suitable for treating osteoarthritis and sports injuries.

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  2. Health & Medicine

    Breast-feeding has protective bonus

    Breast-feeding appears to help ward off breast cancer.

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  3. Health & Medicine

    Lab tool may spawn new antiviral drugs

    Short strands of RNA can be used to stop viruses such as HIV.

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  4. Health & Medicine

    Ulcer bug linked to stroke

    Potent strains of an ulcer-causing bacterium may also trigger strokes.

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  5. Speech loses beat in dyslexia

    The severe reading disorder known as dyslexia may involve an inability to perceive a critical rhythmic beat that separates parts of spoken words.

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  6. Plants

    Disease outpacing control in largest chestnut patch left

    An unusual test of a biological control for the blight that's killing American chestnuts doesn't look good in the largest remaining patch.

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  7. Plants

    Recent tree scourge poses garden threat

    Lab tests suggest that a lethal disease of oak trees in California and Oregon could strike some popular garden shrubs in the rhododendron family.

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  8. Astronomy

    Visible Matter: Once lost but now found

    New observations confirm that most of the visible matter in the universe lies hidden in vast, hard-to-detect gas clouds between galaxies.

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  9. Health & Medicine

    Fullness Factor: Gut hormone tells brain the stomach is well fed

    A hormone produced by the intestines could be the primary satiety signal sent to the brain.

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  10. Ecosystems

    Pfiesteria’s Bite: Microbe may kill fish by skinning, not poisoning

    At least one kind of Pfiesteria—accused of killing fish and threatening human health—does not produce a toxin but kills by eating holes in fish's skin, some researchers say.

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  11. Physics

    Sunlight Sponge? Energy trackers gauge water vapor’s wild dance

    Atmospheric water vapor takes in more solar radiation than has been indicated by measurements and models, but laser probes of highly agitated water molecules suggest that the vapor doesn't absorb enough radiation to explain the discrepancy fully.

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  12. Animals

    Strong Medicine: Over-the-counter remedy snags snakes

    Acetaminophen—the active ingredient in Tylenol—vanquishes brown tree snakes, the bane of Guam.

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  13. Earth

    Long, Dry Spells: Lengthy droughts tied to long-lived La Niñas

    A new study of persistent droughts that occurred in the United States during the past 3 centuries suggests that those dry spells may be associated with prolonged periods when sea-surface temperatures in the central Pacific were cooler than average.

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  14. Health & Medicine

    New Antidote to Botulism: Drug neutralizes toxin in mouse tests

    An experimental drug disables deadly botulism toxin much better than current treatment does.

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  15. Animals

    Slithering on Air: Flying snakes glide through the treetops

    The paradise tree snake flies by flattening its body and slithering through the air.

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  16. Tech

    Shrinking toward the Ultimate Transistor

    Scientists demonstrate transistor action in an atom—or two.

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  17. Materials Science

    Gems of War

    While international bodies grapple with regulatory schemes to stem the diamond trade that funds ongoing civil conflicts in African countries, scientists are attempting to develop methods for identifying gems from conflict zones.

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