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http://www.sciencenews.org/view/issue/id/49842
December 5th, 2009
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The upcoming Copenhagen negotiations will take steps toward an international, climate-stabilizing treaty. (p. 16)
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Adventures in the Tortugas reveal that seagrass fields need saving too (p. 22)
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Studies examine physiology and technology to better foresee the ultimate edge of human performance (p. 26)
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Equines join cucumbers and pigs as the most recent additions to the roster of organisms to have their complete DNA code spelled out. The new work on horses also helps answer a key question about chromosome structures called centromeres. (p. 5)
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By detecting gamma rays, a new generation of telescopes bolsters theory that supernovas are origin of some cosmic rays (p. 8)
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The largest known galactic congregation is bigger than astronomers thought—and its inhabitants are all dead or dying. (p. 9)
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The signature of positrons has been found for the first time in gamma rays associated with storms on Earth. (p. 9)
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A compound that unshackles a tumor-suppressing protein called p53 can slow the growth of the malignancy in mice, a new study finds. (p. 10)
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Rodent study offers first evidence that neurogenesis clears old memories in key part of the brain to make way for new ones. (p. 10)
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The world-renowned ice caps could disappear by 2022, new research suggests. (p. 11)
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Quakes far from tectonic plate boundaries may simply be aftershocks of ancient temblors. (p. 11)
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In a first, a study shows that bioluminescence can be controlled by slow-acting hormones, not rapid-fire nerve cells. (p. 12)
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Scorpionflies with long-reaching mouthparts may have helped plants procreate long before blossoms evolved. (p. 12)
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Streamside wildflower holds back on leaf competition when roots meet close kin (p. 13)
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Female crab spiders switch colors to match flowers but may not fool their prey (p. 13)
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Study of hunter-gatherer community in Tanzania shows that, across human groups, mating criteria vary. (p. 14)
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Days after birth, French and German infants wail to the melodic structure of their languages. (p. 14)
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(p. 4)
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(p. 4)
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(p. 30)
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Review by Tom Siegfried (p. 30)
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(p. 30)
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(p. 30)
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(p. 32)
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