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http://www.sciencenews.org/view/issue/id/420
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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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April 29th, 2000
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A balloon-borne experiment circling Antarctica has measured the curvature of the universe and revealed that it's perfectly flat. (p. 276)
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Enriching the diet with calcium, especially from dairy products, can switch the body's fat cells from storing calories to burning them. (p. 277)
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Gene therapy to repair mutations that thwart development of essential immune cells has helped three babies to overcome severe combined immunodeficiency, in which a child is born without a functional immune system. (p. 277)
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FDA clinical trials suggest that placebos provide substantial relief to depressed patients, but debate continues about whether it's ethical to use placebos in studies of antidepressant drugs. (p. 278)
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A textbook example of mutualism—birds that ride around picking ticks off big African mammals—may not be mutually beneficial at all. (p. 278)
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A study of cloned cows provides reassurance that cloned animals won't die prematurely and may even live extra-long. (p. 279)
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A novel suspended device chilled near absolute zero demonstrates the existence of a basic unit, or quantum, of heat conductance—the first evidence of quantum mechanics in mechanical structures. (p. 279)
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Baboon intimacy and detachment present vexing clues. (p. 280)
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Computers are unscrambling genomes to reveal the secrets in DNA codes. (p. 284)
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Marmots are coming out of hibernation earlier, while chipmunks and ground squirrels sleep longer-effects that could be attributed to global warming. (p. 282)
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More than 5,000 years ago, the Botai people of central Asia had ritual practices that appeared in many later cultures. (p. 287)
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Human ancestors may have learned to control fire 1.7 million years ago in eastern Africa. (p. 287)
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Researchers demonstrated that they can use a scanning tunneling microscope to position atoms in microscopic patterns at room temperature. (p. 287)
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An orbiting electron accelerated to relativistic velocities by a laser in a strong magnetic field can behave like a ring-shaped electron cloud spinning around the nucleus. (p. 287)
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