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http://www.sciencenews.org/view/issue/id/8248
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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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February 24th, 2007
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Astronomers have for the first time recorded the spectra of light emitted by two extrasolar planets. (p. 115)
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Being either overnourished or undernourished before birth can alter gene activity, leading to obesity during adulthood. (p. 115)
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A new artificial knee ligament that sparks regeneration of natural tissue could eventually make recovering from knee-repair surgery less painful and debilitating. (p. 116)
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An antiviral drug commonly taken for genital herpes seems to suppress HIV in people harboring both pathogens. (p. 116)
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The strongest evidence yet that animals plan ahead may come from western scrub jays preparing for their morning meals. (p. 117)
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New results direct the search for autism-influencing genes to a previously overlooked DNA segment and highlight the role of a crucial chemical-messenger system in creating brains susceptible to autism. (p. 117)
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Unprecedented recent changes in the yearly pattern of ocean currents off North America's West Coast have wreaked havoc on aquatic ecosystems there, another possible symptom of Earth's warming climate. (p. 118)
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Two new surveys of the night sky examine the two facets of galaxy formation: the glitter and the gloom. (p. 120)
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A physicist who uses fractals to investigate the authenticity of some paintings attributed to Jackson Pollock finds that the works may be fake. But is the flaw in the paintings or in the fractal analysis? (p. 122)
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The Ulysses spacecraft passed directly below the sun on Feb. 7, looking up at its south pole, a feat the craft has done only twice before. (p. 125)
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The Bush administration's proposed 2007 farm bill would merge two existing U.S. Department of Agriculture research agencies into a single office of science. (p. 125)
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Coffee is a significant, and previously unrecognized, source of dietary fiber. (p. 125)
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Researchers may have found the mechanism powering a mysterious gliding motion in bacteria. (p. 125)
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People who die from a stroke have accumulations of a protein called amyloid beta in the thalamus, a part of the brain involved in motor control and sensory processing. (p. 126)
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A heightened risk of having a brain aneurysm seems to be passed down in some families, and the life-threatening rupture of an aneurysm appears to strike earlier in a succeeding generation. (p. 126)
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Some people are resistant to the blood-thinning effects of aspirin, making them more vulnerable to stroke or heart problems. (p. 126)
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An experimental procedure that delivers a clot-busting drug directly to the brain can bring on a remarkable turnaround in some stroke patients. (p. 126)
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(p. 127)
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