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http://www.sciencenews.org/view/issue/id/7977
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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 25th, 2006
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Scientists have engineered cotton plants that produce seeds missing a toxic compound that had previously made them inedible. (p. 339)
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Switching forms of one gene can make a male fruit fly fight like a girl, and vice versa. (p. 339)
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Large galaxies usually have no more than three supernovas blow up in a century, but the nearby galaxy NGC 1316 has had two such explosions within the past 5 months and four in the past 26 years. (p. 340)
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The trial drug roscovitine has been shown to reverse polycystic kidney disease in mice. (p. 340)
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A heavy dose of boron transforms silicon, the superhero material of electronics, into a superconductor. (p. 341)
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Male chimpanzees in Uganda prefer to mate with older females, a possible sign of males' need to identify successful mothers in a promiscuous mating system. (p. 341)
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Men whose hearts beat faster over time are likely to die earlier than those whose hearts keep an unchanging cadence year after year, according to a 20-year study. (p. 342)
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Most of the annual variation in the extent of coral bleaching in the Caribbean is driven by two factors: the amount of dust and other particles suspended in the atmosphere, and the climate phenomenon known as El Niño. (p. 342)
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Chemists and engineers have designed two-dimensional structures that self-fold into functional, three-dimensional objects, such as miniature chemistry laboratories and drug-delivery devices. (p. 344)
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Mathematics is helping explain how animals form flocks, swarms, and schools. (p. 347)
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In insect societies that have tough police, it's coercion, rather than kinship, that's preventing crime. (p. 349)
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Mimicking jet lag in old mice brought on an early death in the animals. (p. 349)
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An experimental device that combines a special comb with a forceful air blower kills head lice and their nits. (p. 350)
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Physicists have discovered never-before-seen subatomic particles related to protons and neutrons but laden with exotic, heavy subparticles called bottom quarks. (p. 350)
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Mice genetically engineered to have slightly lower-than-normal body temperatures lived significantly longer than mice with normal body temperatures. (p. 350)
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A hair-darkening paste invented thousands of years ago forms lead-and-sulfur nanocrystals remarkably similar to those made in today's nanotechnology labs. (p. 350)
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(p. 351)
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