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http://www.sciencenews.org/view/issue/id/2802
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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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June 8th, 2002
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Sensors on board the Mars Odyssey spacecraft have spied strong signs of ice buried near both poles of the Red Planet, exactly the regions where scientists previously had said that such frozen water deposits could exist. (p. 355)
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Children diagnosed with bipolar disorder, a psychiatric ailment characterized by severe mood swings, exhibit a depressingly poor response to standard drug treatments and psychotherapy. (p. 355)
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The discovery of deuterated ammonia in space could help astronomers better understand the complex chemistry of dark clouds in star-forming regions. (p. 356)
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Cow kidneys and other tissue made by cloning ward off immune rejection after transplantation into cows. (p. 356)
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Residues of oil spilled in the Galapágos Islands in January 2001 may have caused a 60 percent decline in one island's colony of marine iguanas. (p. 357)
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Some genes in the cholera-causing bacterium Vibrio cholerae are activated and others are silenced when the microbe passes through the human gut, changes that make the bacterium more virulent. (p. 357)
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New images provide a graphic demonstration that the Hubble Space Telescope's infrared vision has been restored. (p. 358)
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A bacterium may have revealed the origin of a key cell structure. (p. 366)
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New studies suggest that a natural process called immune activation—the signaling that alerts immune cells of foreign invaders—plays a key role in explaining why infection with the human immunodeficiency virus progresses to AIDS more quickly in some people than in others. (p. 360)
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New computer simulations suggest that the first stars in the universe were extremely massive and left behind gamma-ray bursts that may already have been detected by telescopes orbiting Earth. (p. 362)
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Though health groups advocate getting mercury thermometers out of the home, obtaining sound advice on how to dispose of the thermometers can be problematic. (p. 365)
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Chemicals that deprive bacteria of iron may improve deodorants. (p. 366)
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The bacterium that causes leprosy directly damages a protective sheathing around many nerve cells. (p. 365)
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The inflammation-fighting drug infliximab can hold off the painful symptoms of Crohn's disease for as long as a year in many patients. (p. 365)
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A rise in the appetite-enhancing hormone ghrelin after weight loss may explain why dieters regain pounds. (p. 366)
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Nearly all of the oil entering the marine environment traces not to accidents but to natural seeps and human activities where releases are intentional. (p. 365)
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A feed additive could reduce methane emissions from cows. (p. 366)
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The Solar Physics Division of the American Astronomical Society has given its 2002 popular writing award to Ron Cowen and Sid Perkins for a two-part series on cyclic variations in the sun's activity. (p. 356)
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