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http://www.sciencenews.org/view/issue/id/3906
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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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May 31st, 2003
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New data suggest that typical exposures to chemicals called phthalates are associated with reduced fertility in men, but the specific phthalates they finger aren't those that researchers most expected to cause problems. (p. 339)
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A new technique enables scientists to choreograph individual molecules to vibrate, break bonds, and move on a surface in specified ways. (p. 339)
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As Canadian health officials investigate mad cow disease within the country's borders, researchers are already working on the next generation of defenses. (p. 340)
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People vaccinated against smallpox decades ago may retain significant immunity to the virus that causes the disease. (p. 340)
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On May 8, 2003, scientists pointed a camera on board the Mars Global Surveyor probe back at Earth and captured the first image from another planet that shows our world as more than a point of light. (p. 341)
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Using the largest survey of galaxies ever compiled, astronomers have found that the cosmos divides sharply along color lines. (p. 341)
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Elderly women taking estrogen and progestin are more likely to develop dementia, including Alzheimer's disease, and stroke than are women not taking the hormones. (p. 341)
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By tweaking the crystal structure of the semiconductor gallium arsenide, researchers may have found a way to make cheaper components for fiberoptic networks. (p. 342)
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The normal microbial inhabitants of our intestines do a lot for their host. (p. 344)
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By dissecting famous paintings in new ways, scientists are testing the veracity of artist David Hockney's controversial theory that some masters of Renaissance art secretly used optical projection devices. (p. 346)
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Stem cells from mouse embryos can be converted into eggs, skin, or heart muscle. (p. 349)
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Scientists for the first time literally shed light on the properties of radioactive fermium. (p. 349)
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Gene therapy that induces infected liver cells to self-destruct slows hepatitis C dramatically in mice. (p. 349)
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A new genetic study reaches the controversial conclusion that chimpanzees belong to the genus Homo, just as people do. (p. 349)
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Federal agencies issued a warning that much of the vermiculite ceiling insulation installed a decade or more ago may be tainted with cancer-causing asbestos. (p. 350)
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Researchers have demonstrated that, in principle, they can add genes that block genetically modified crops from breeding with conventional varieties and thus from spreading their artificial traits. (p. 350)
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Mathematicians have returned to the drawing board after what looked like a dramatic step forward in understanding prime numbers. (p. 350)
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Two Science News writers recently received prestigious fellowships. (p. 351)
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