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http://www.sciencenews.org/view/issue/id/8911
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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 15th, 2007
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Positronium, consisting of electrons and their antimatter counterparts, has been made into a molecular form. (p. 163)
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An extrasolar planet survived after its aging parent star ballooned into a red giant that almost engulfed it. (p. 163)
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Salmon implanted with trout reproductive tissue bred to produce a generation of normal rainbow trout. (p. 164)
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A popular diabetes drug significantly increases the risk of heart failure and heart attack in those who take it. (p. 164)
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Microorganisms that lived 3.5 billion years ago obtained energy by metabolizing pure sulfur. (p. 165)
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Amyloid-beta, a protein implicated in Alzheimer's disease, causes misfiring of neurons and minor brain seizures in mice. (p. 165)
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A new high-resolution printing technique could make flexible electronics such as plastic displays and solar cells easier to produce. (p. 166)
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A component of the spice turmeric, the color-giving ingredient in yellow curries, may help prevent and possibly treat Alzheimer's disease. (p. 167)
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Observations of children born without most of the brain's outer layer, or cortex, and evidence from animal studies suggest that a basic form of consciousness may arise from the brain stem alone. (p. 170)
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A tumor cell protein influences blood platelets in a way that helps a cancer spread through the body. (p. 173)
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Four galaxies are ramming into each other in one of the biggest cosmic collisions ever recorded. (p. 173)
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Among people with perfect pitch, the most common error seems to be misidentifying G flat as A, the note on which orchestras traditionally tune. (p. 173)
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An enhanced ability to digest starch may have given early humans an evolutionary advantage over their ape relatives. (p. 173)
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A 6,000-year-old city in what's now northeastern Syria developed when initially independent settlements expanded and merged, unlike other nearby cities that grew from a core outward. (p. 174)
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Magnetite nanoparticles have catalytic properties that may be useful in wastewater treatment and biomedical assays. (p. 174)
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A newly discovered exoplanet is the largest and lowest-density such object yet found. (p. 174)
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A growth factor that promotes blood vessel development also maintains normal blood vessel health, perhaps explaining the vascular side effects of some cancer drugs. (p. 174)
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(p. 175)
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