Vol. 164 No. #18 Archives

More Stories from the November 1, 2003 issue

  1. Paleontology

    Tracks suggest chase, capture, and after-meal respite

    A 1.3-meter-long, S-shaped trail of fossil footprints discovered in southwestern Indiana includes one set of disappearing tracks—suggesting an ancient chase—and an impression where the predator rested after its meal.

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  2. Paleontology

    Role of gastroliths in digestion questioned

    New analyses of the gastroliths in ostriches are casting doubt on the theory that large, plant-eating dinosaurs swallowed stones to grind up tough vegetation and thereby aid their digestion.

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  3. Paleontology

    Healed scars tag T. rex as predator

    Healed wounds on the fossil skull of a Triceratops—wounds that match the size and shape of those that would be made by Tyrannosaurus rex—are a strong sign that the tooth scrapes are a result of attempted predation, not scavenging.

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  4. Paleontology

    Ancient atmosphere was productive

    New laboratory experiments suggest that extra carbon dioxide in the atmosphere in the era just before the dinosaurs went extinct may have boosted plant productivity to at least three times that found in today’s ecosystems.

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  5. Chemistry

    Clays catalyze life?

    Clay minerals at the bottom of the ocean may have played a crucial role in assembling the very first cells on Earth billions of years ago.

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  6. Health & Medicine

    Cancer drug might fight Alzheimer’s

    Tests in animals show that the cancer drug imatinib mesylate, also called Gleevec, slows formation of the kinds of plaques found in the brains of Alzheimer's patients.

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  7. Physics

    New type of material that heat can’t bloat

    A newfound material exhibits the desirable property of not expanding when heated over a wide temperature range, but from an apparent cause never seen before—electrons changing positions inside the new compound's crystal structure.

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  8. Earth

    California acts on plastic additive

    Korean engineers have developed a replacement for a plasticizer used in polyvinyl chloride that California has just ruled is a known reproductive toxicant.

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  9. Humans

    Letters

    Letters from the Nov. 1, 2003, issue of Science News.

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  10. Earth

    Flaming Out? Days may be numbered for two fire retardants

    The maker of two controversial flame-retardant chemicals has voluntarily initiated negotiations with the federal government to end their production.

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  11. Astronomy

    Cosmic Survey: Galaxy map reveals dark business as usual

    The most precise map of how galaxies cluster, pulled together by the tug of gravity, has confirmed that most of the cosmos is in the dark, consisting of 5 percent ordinary matter, 25 percent dark matter, and 70 percent dark energy.

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  12. Health & Medicine

    Antiviral Advance: Drug disables enzyme from hepatitis C virus

    A new drug prevents the replication of the hepatitis C virus.

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  13. Animals

    First Impressions: Early view biases spider’s mate choice

    In a new wrinkle on how females develop their tastes in males, a test has found that young female wolf spiders that see a male's courtship display grow up with a preference for that look in mates.

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  14. Astronomy

    Out of Hiding: Lost asteroid reappears, bringing surprises

    A long-lost asteroid that came close to Earth in 1937 has been spotted again, and its projected path steers clear of Earth.

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  15. Anthropology

    Stone Age Code Red: Scarlet symbols emerge in Israeli cave

    Lumps of red ocher excavated near human graves in an Israeli cave indicate that symbolic thinking occurred at least 90,000 years ago, much earlier than archaeologists have traditionally assumed.

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  16. Earth

    Blame the Sea? Ocean may be melting ice shelf from below

    Significant portions of a large Antarctic ice shelf just south of one that suddenly broke apart in February 2002 are rapidly thinning and may suffer a similar, catastrophic demise in less than a century.

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  17. Materials Science

    Water Repellency Goes Nano: Carpet of carbon nanotubes cleans itself

    Forests of carbon nanotubes coated with Teflon yield a superhydrophobic material—the ultimate self-cleaning surface.

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  18. Physics

    A Spin through Space-Time

    After 40 years of preparation, satellite Gravity Probe B is scheduled to launch next month and test the prediction that massive bodies, such as Earth, twist space itself as they rotate.

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  19. Beast Buddies

    As researchers muse about the evolutionary origins of friendship, even the social interactions of giraffes are getting a second look.

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