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http://www.sciencenews.org/view/issue/id/5195
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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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July 10th, 2004
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Scientists are beginning to unravel the genetic mechanism that causes nearsightedness. (p. 19)
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Dropping a steel ball into fine, loosely packed sand produces towering jets of grains. (p. 19)
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The herbicide atrazine is more likely to kill developing amphibians when it is highly diluted than when it's much more concentrated in aquatic environments. (p. 20)
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A new analysis of fossil teeth indicates that the number of people surviving long enough to become grandparents dramatically increased about 30,000 years ago. (p. 20)
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A suite of at least 10 genes in a tomato plant behaves differently depending on the farmer's mulch-and-fertilizer routine. (p. 21)
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Satellite observations of eastern North America show that plants in and around urban areas bud earlier in the spring and retain their foliage later in the fall than do plants in nearby rural settings. (p. 21)
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After a 7-year, 3.5-billion-mile journey, the Cassini spacecraft last week slipped through a gap between two of the icy rings circling Saturn and became the first spacecraft to orbit the distant planet. (p. 22)
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On June 8, the black dot of Venus passed across the face of the sun, the first time it did so in 122 years. (p. 24)
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Genetically engineered mice that get prematurely old give hints to the causes of aging. (p. 26)
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The billion-ton blobs of magnetized gas that the sun sporadically hurls into space can't reach Earth in less than half a day. (p. 29)
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Regularly downing sweet drinks or sugar substitutes may foster overeating by reprogramming an individual's ability to judge a snack's caloric impact. (p. 29)
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Chemists use DNA as a scaffold to construct miniature rings and rods out of silica. (p. 29)
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Agricultural data gathered over a dozen years at a Philippines rice paddy suggest that climate changes brought about by global warming could significantly diminish rice yields. (p. 29)
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An analysis of mitochondrial DNA from Pacific rats supports a theory that ancestors of today's Polynesians migrated from Southeast Asia to a string of South Pacific islands in at least two separate dispersals. (p. 30)
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Biologists now have a way to predict when a woman will start menopause. (p. 30)
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The abnormal production of a parasite-fighting enzyme contributes to asthma. (p. 30)
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Tiny magnetic particles in the pigments of some Mexican murals recorded the direction of Earth's magnetic field when the paint dried. (p. 30)
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(p. 31)
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