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http://www.sciencenews.org/view/issue/id/8954
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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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September 29th, 2007
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Hair from ancient mammoths contains enough genetic material to permit reconstruction of parts of the animal's genome. (p. 195)
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Mosquito nets treated with insecticides decrease death rates among children in Kenya's malarial zones. (p. 195)
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Kelp, algae that grow in cold water, turn out to be surprisingly widespread in tropical seas. (p. 196)
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By depleting an essential amino acid and releasing a toxin, cancer cells can ward off attack by the immune system. (p. 196)
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Bacteria that flew on a space shuttle became deadlier than their earthbound counterparts. (p. 197)
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Thimerosal, a mercury-containing vaccine preservative, shows no signs of causing memory, attention or other problems in children. (p. 197)
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Rock from Hawaii was fashioned into a stone tool found in Polynesian islands more than 4,000 kilometers to the south, indicating that canoeists made the sea journey around 1,000 years ago. (p. 198)
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The remarkable strength and electrical properties of graphene, a chicken-wire network of carbon atoms, make it a promising new material for computer chips. (p. 200)
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The toxicity of a chemical that leaches from a widely used plastic receives conflicting evaluations in two new reviews. (p. 202)
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A single atom on a surface has favored magnetic orientations that could allow it to encode a data bit. (p. 205)
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Nanoparticles in diesel fumes thwart proteins that dissolve blood clots, perhaps increasing the risk of heart attacks. (p. 205)
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Honeybees gang up on an attacking hornet, killing it by blocking its breathing. (p. 205)
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Rice with an added gene needs less water and can survive drought. (p. 205)
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Blurry images yield estimates of the true width of glowing meteor vapor trails in Earth's upper atmosphere. (p. 205)
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The malaria parasite's reliance on a sugar in the gut of mosquitoes may offer a way to block the disease's transmission. (p. 206)
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A constituent of green tea rescues brain cells damaged in a way that mimics the effect of Parkinson's disease. (p. 206)
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An amino acid in tea combines with the brew's caffeine to enliven brain cells that aid concentration. (p. 206)
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(p. 207)
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