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http://www.sciencenews.org/view/issue/id/9068
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In This Issue
- Ultramassive: as big as it gets: A black hole can consume anything in its path. These monsters can become huge — but perhaps only so huge.
- Body In Mind: Long thought the province of the abstract, cognition may actually evolve as physical experiences and actions ignite mental life
- This week's table of contents
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November 3rd, 2007
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New analysis of 25-year-old blood samples indicates that HIV reached the United States in about 1969, 12 years before AIDS was first formally described. (p. 275)
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Two species of small, little-known rain forest mammals may be primates' closest living relatives. (p. 275)
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The ability of newts to regenerate severed limbs depends crucially on a protein released by the insulating sheath around nerves. (p. 276)
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A special type of French clay smothers a diverse array of bacteria, including antibiotic-resistant strains and a particularly nasty pathogen that causes skin ulcers. (p. 276)
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An immense volume of ice-rich material may underlie a formation that extends about one-quarter of the way around Mars' equator. (p. 277)
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A widely used drug often calms children with attention-deficit hyperactivity disorder but does little to alleviate the condition's underlying mental deficits. (p. 277)
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A computer model simulates a kind of rock-paper-scissors competition among three species of virtual bacteria. (p. 278)
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Manipulation of signaling proteins on blood vessels may help combat sepsis, an often fatal condition. (p. 278)
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Two new fossil discoveries and an analysis of ancient teeth challenge traditional assumptions about ape and human evolution. (p. 280)
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An orbiting gamma-ray observatory, set for launch next spring, will seek out the most violent events in the cosmos. (p. 283)
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DNA analysis indicates that some Neandertals may have had a gene for pale skin and red hair. (p. 285)
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An innovative printing scheme makes three-dimensional crystal structures that could be used to control the flow of light. (p. 285)
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A newly found fossil preserves one creature inside another that lies nestled inside yet another, a Paleozoic version of the Russian nesting dolls known as matrushkas. (p. 286)
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The meat-eating dinosaur Deinonychus probably used the large, sicklelike claw on its foot to grip and climb large prey, not disembowel it. (p. 286)
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Distinctive bone tissue in fossils of several dinosaur species suggests that the ancient reptiles became sexually mature long before they gained adult size. (p. 286)
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The dire wolf, an extinct species preserved in abundance at the La Brea tar pits, seems to have had a social structure similar to that of its modern-day relatives. (p. 286)
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(p. 287)
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Science & the Public
Oct 15th 2008
Comment
Oct 10th 2008
Math Trek
The U.S. News & World Report rankings of colleges and universities are largely arbitrary, according to a new mathematical analysis. Oct 3rd 2008
The U.S. News & World Report rankings of colleges and universities are largely arbitrary, according to a new mathematical analysis. Oct 3rd 2008
Natural History of the Point Reyes Peninsula
Univ. of California, 2008, 366 p., $24.95
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Univ. of California, 2008, 366 p., $24.95
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