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http://www.sciencenews.org/view/issue/id/6375
July 16th, 2005
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Scientists have deciphered the DNA of the parasites responsible for African sleeping sickness, Chagas' disease, and leishmaniasis. (p. 35)
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A gene called Reprimo is shut down in several cancers but rarely in healthy cells. (p. 35)
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Adult neural stem cells protect the brain against repeated episodes of inflammation in disorders such as multiple sclerosis by killing inflammatory immune cells. (p. 36)
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There's more than enough wind power to satisfy the United States' energy requirements, a new analysis of weather data suggests. (p. 36)
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When seabirds go out looking for food, they can bring home traces of pollutants that build up around their nesting colonies. (p. 36)
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In a laboratory setting, volunteers breathing pollutants generated by sources such as vehicle engines experience slight but steady increases in blood pressure. (p. 37)
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A novel time machine concept may avoid a problem of earlier, less-practical proposals by requiring only normal matter and the vacuum known to exist in space. (p. 38)
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Three suns grace the skies above a newly found, Jupiterlike extrasolar planet, posing a puzzle for how massive planets form in a closely-knit, multiple-star system. (p. 38)
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A new U.S. postage stamp honoring physicist and folk hero Richard P. Feynman sports curious squiggles, invented by Feynman, that were rejected at first but soon became a major tool of physicists everywhere for picturing the behaviors and calculating the properties of matter and energy. (p. 40)
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Energy-efficient, semiconductor-based chips called light-emitting diodes will begin to illuminate homes and offices within the next decade, displacing power-hungry incandescent and fluorescent lighting. (p. 43)
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New research suggests that several species of Geobacter bacteria use hairlike structures known as pili to move electrons. (p. 45)
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Stem cells in heart tissue that has survived a heart attack can be prodded to regenerate dead portions of the injured organ. (p. 45)
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Two new vaccines protect against the lethal Ebola and Marburg viruses, tests in monkeys show. (p. 45)
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Researchers off the coast of California have captured three deep-water siphonophores, relatives of jellyfish, and observed in the lab that the creatures twitch little red lights that could be lures for fish. (p. 46)
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Hypnotic suggestions to perceive written words as gibberish depress activity in brain areas responsible for vision, possibly reflecting a hypnosis-induced decline in attention paid to visual objects. (p. 46)
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Minuscule gaps of controlled sizes in gold microwires may serve as test sites for probing properties of specks of material as small as a single molecule and as a basis for novel sensors and circuit components. (p. 46)
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(p. 47)
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