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http://www.sciencenews.org/view/issue/id/9022
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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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October 20th, 2007
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A new test for human papillomavirus (HPV) detects cervical cancer more reliably than traditional Pap smears. (p. 243)
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A South African cave yields evidence of complex, symbolic behavior among ancient people about 164,000 years ago, the oldest such indications yet. (p. 243)
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Common songbirds such as starlings may be able to carry and spread avian influenza. (p. 244)
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Snippets of RNA that regulate gene activity play a role in muscle-wasting diseases such as muscular dystrophy. (p. 244)
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New experiments contradict earlier claims of the discovery of the axion, a possible constituent of cosmic dark matter. (p. 245)
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An ultrasharp image of part of Mars' Gale crater shows waterborne sediments and volcanic ash. (p. 245)
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As ocean waters trend toward acidity, a result of atmospheric greenhouse gas buildup, a shoreline snail's defense against predatory crabs may weaken. (p. 245)
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Measuring the amounts of certain proteins in the blood might provide early warning of Alzheimer's disease. (p. 294)
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Making embryonic stem cells from unfertilized eggs might bypass many ethical concerns, but important scientific hurdles remain. (p. 248)
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Salmonella and other human pathogens on vegetables aren't just riding along like casual smears of dirt; they're moving in and setting up housekeeping. (p. 250)
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Cheaper than a typical hydrogen fuel cell, a new, platinumfree cell runs on a "green" liquid fuel. (p. 253)
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A newly assembled mosaic of radar images of Saturn's moon Titan shows what appear to be hydrocarbon lakes and seas. (p. 253)
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The Large and Small Magellanic Clouds are not gravitationally bound to the Milky Way, but are relative newcomers passing by for the first time. (p. 253)
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Ordinary CD disc players can be adapted to perform chemical assays and possibly medical diagnoses. (p. 253)
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Gluing together nanoscale clay particles with a simple adhesive creates a strong but flexible material. (p. 254)
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Mutant bacteria thrive by freeloading off their hard-working kin, but these slackers revert to working normally if they become too numerous. (p. 254)
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The action of a stress hormone could be why emotionally charged events form especially vivid and durable memories. (p. 254)
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(p. 255)
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