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http://www.sciencenews.org/view/issue/id/6101
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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 23rd, 2005
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By making an extremely hot and dense state of matter that, surprisingly, is a liquid, physicists say they may have finally created a sample of matter much like the primordial stuff that permeated the newborn universe and gave rise to all other matter. (p. 259)
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A swarm of warm dust surrounding a star 41 light-years from Earth may be a sign of the closest extrasolar analog to the solar system's asteroid belt. (p. 259)
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Tiny tropical ants build shaggy platforms on plants and hide underneath them, poised to reach out and capture insects that may be far larger than themselves. (p. 260)
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People with HIV are many times more infectious to their sexual partners in the weeks or months just after they acquire the virus than they are later on, a study in Uganda demonstrates conclusively. (p. 260)
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Researchers have induced a hibernation-like state in mice by exposing them to low concentrations of hydrogen sulfide. (p. 261)
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By nestling droplets inside larger droplets, scientists have created a new strategy for encapsulating food additives and fragrances. (p. 261)
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Brief periods of daily exposure to bright light are an effective treatment option for depression. (p. 261)
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A new computer model that analyzes summer-wind patterns can help predict whether the United States will suffer a damaging hurricane season. (p. 262)
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A study of galaxy clusters tests whether dark matter particles can collide with each other, while other observations show that dark matter doesn't behave as expected near the centers of galaxies. (p. 264)
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Researchers are developing nanosize metallic particles that can break down soil and groundwater contaminants faster and more cheaply than any other existing technology. (p. 266)
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Images taken by two Mars spacecraft suggest that a volcano on the Red Planet erupted long ago at the confluence of two riverbeds, indicating that the region had two of the prequisites for life: heat and water. (p. 269)
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At least in mice, obesity can greatly exaggerate the severity of flu by impairing the body's immune response. (p. 269)
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The Food and Drug Administration has asked Pfizer to stop selling its prescription pain medication valdecoxib (Bextra). (p. 269)
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Balloons and condoms that come in contact with body fluids discharge chemicals suspected of being human carcinogens. (p. 269)
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A camera aboard the Deep Impact spacecraft, set to fire a projectile into the icy heart of Comet Tempel-1 on July 4, is slightly out of focus. (p. 270)
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Step aerobics proved better than resistance exercises for building bone density. (p. 270)
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Neandertals evolved big, broad noses not in response to a cold climate, as has often been argued, but in conjunction with the expansion of their upper jaws. (p. 270)
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A new analysis of fossil backbones indicates that human ancestors living around 3 million years ago were able to walk much as people today do. (p. 270)
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(p. 271)
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