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http://www.sciencenews.org/view/issue/id/6758
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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 12th, 2005
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Excavations in the Andes mountains have unearthed the earliest known irrigation canals in South America. (p. 307)
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A synthetic version of a protein present in a woman's body during pregnancy is as effective against breast cancer as the current drug tamoxifen is, according to a study in rodents. (p. 307)
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A study in mice suggests that a drug prescribed for high cholesterol may reverse learning deficits caused by a common genetic disease. (p. 308)
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Researchers have characterized the primary components of the migratory pheromone that guides sea lampreys to suitable spawning areas. (p. 308)
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A study of creatures that fly around at night suggests that scarce food may account for why some bats avoid hunting under a full moon. (p. 309)
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Archaeological excavations at a prison near Megiddo, Israel, have unearthed the remains of what may be one of the region's oldest Christian churches. (p. 309)
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Electrical measurements of one-atom-thick slices of carbon reveal extraordinary electronic properties, including electrons that seem massless and move at blazing speeds. (p. 309)
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Relying solely on the tug of gravity, a proposed spacecraft could divert an asteroid on a collision course with Earth. (p. 310)
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A variety of changes in the Arctic is making the region darker and accelerating its warming climate. (p. 312)
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Investigating how uncooked spaghetti breaks has uncovered new mechanisms behind shattering and energy concentration, with possible implications for how structures fail. (p. 315)
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Moderate consumption of alcohol may make a person's blood less likely to clot. (p. 317)
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New, ultraprecise measurements of single-particle trajectories confirm that there's something missing from Einstein's mathematical model for Brownian motion. (p. 317)
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Isotopic analyses of the teeth of otters and mongooses from Africa have led one paleontologist to suggest that some of humanity's ancient kin shared those modern animals' preference for shelled prey such as freshwater crabs and snails. (p. 318)
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Changes in the proportions of various chemical isotopes deposited in mammoth tusks as they grew have enabled scientists to estimate how long it took juvenile mammoths to become fully weaned. (p. 318)
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Researchers in Argentina have discovered fossils that may represent the heftiest flightless bird to ever have roamed the planet. (p. 318)
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(p. 319)
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