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http://www.sciencenews.org/view/issue/id/304
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In This Issue
- Sequencing the dead to save the living: Reviving ancient genomes of long-extinct creatures offers a window into past extinctions—and may help prevent future die outs
- No gene is an island: Even as biologists catalog the discrete parts of life forms, an emerging picture reveals that life’s functions arise from interconnectedness
- The decider: Informing the debate over the reality of ‘free will’ requires learning something about the lateral habenula
- This week's table of contents
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March 25th, 2000
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A new analysis settles the question of whether carbon molecules found in meteorites have an extraterrestrial origin. (p. 196)
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Scientists have identified a large family of proteins that work as taste receptors for bitterness. (p. 196)
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Pig brain cells transplanted into the brains of patients with advanced Parkinson's disease help some of the patients regain mobility and the ability to do basic tasks. (p. 197)
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A biotech company announced the first cloning of pigs. (p. 197)
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Scientists have created a device with bizarre electromagnetic properties—but so far, only at microwave frequencies. (p. 198)
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Octonoba spiders tune the sensitivity of their webs according to how hungry they are. (p. 198)
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U.S. cattle have dramatically higher rates of infection with a virulent food-poisoning bacterium than had been realized, a factor that leads to widespread carcass contamination during slaughter. (p. 199)
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Roughly half the 120 unidentified sources of high-energy gamma-ray emissions in the Milky Way—those at midgalactic latitudes—may comprise a new class of objects and originate from a belt of massive stars that lies only a few hundred light-years from the solar system. (p. 199)
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Scientists are discovering that more carbon dioxide in the air could spell disaster for plants and the animals that love to eat them. (p. 200)
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The impending collapse of a 40-year union between the electronic wonder materials silicon and silicon dioxide threatens the advance of chip technology and propels a high-stakes search for silicon dioxide replacements. (p. 204)
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A new gravity map of Mars has revealed a network of buried channels that billions of years ago may have been on the surface and helped carry water to fill an ancient ocean. (p. 206)
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Astro-E, a Japanese X-ray observatory, fell back to Earth and burned up just after launch on Feb. 9. (p. 206)
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Two studies cast doubt on the apparent link between night lights in a baby's nursery and an increased risk of being nearsighted later in childhood. (p. 207)
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People who have had a major blood clot in a vein are roughly twice as likely to harbor high concentrations of blood coagulation factor XI as people who haven't. (p. 207)
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Microscopic carbon forests can grow on a graphite surface without the help of catalysts. (p. 207)
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Carbon nanotubes are very sensitive to oxygen, an effect that could limit their use in open-air applications. (p. 207)
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A new electronic nose detects amine compounds produced when fish decay. (p. 207)
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