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http://www.sciencenews.org/view/issue/id/4378
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In the December 5 Issue:
- TABLE OF CONTENTS
- Climate might be right for a deal: Copenhagen negotiations will take steps toward a climate-stabilizing treaty
- Botanical Whales: Adventures in the Tortugas reveal that seagrass fields need saving too
- Breaking the Speed Limit: Studies examine physiology and technology to better foresee the ultimate edge of human performance
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November 1st, 2003
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The maker of two controversial flame-retardant chemicals has voluntarily initiated negotiations with the federal government to end their production. (p. 275)
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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. (p. 275)
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A new drug prevents the replication of the hepatitis C virus. (p. 276)
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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. (p. 276)
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A long-lost asteroid that came close to Earth in 1937 has been spotted again, and its projected path steers clear of Earth. (p. 277)
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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. (p. 277)
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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. (p. 278)
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Forests of carbon nanotubes coated with Teflon yield a superhydrophobic material—the ultimate self-cleaning surface. (p. 278)
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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. (p. 280)
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As researchers muse about the evolutionary origins of friendship, even the social interactions of giraffes are getting a second look. (p. 282)
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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. (p. 285)
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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. (p. 285)
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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. (p. 285)
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Korean engineers have developed a replacement for a plasticizer used in polyvinyl chloride that California has just ruled is a known reproductive toxicant. (p. 285)
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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. (p. 286)
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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. (p. 286)
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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. (p. 286)
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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. (p. 286)
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Letters from the Nov. 1, 2003, issue of Science News. (p. 287)
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