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Your search has returned 19 articles:
  • News

    Ancient slowpoke

    A 1-centimeter-long, 505-million-year-old fossil from British Columbia connects two lineages of marine invertebrates from the Cambrian period that scientists hadn't previously linked.

    One group, the halkieriids, protected themselves with plates and mineralized shells—"like armored slugs," says Simon Conway Morris, a paleontologist at the University of Cambridge in England....

    02/28/2007 - 12:19 Paleontology
  • News

    Equal Opportunity Outcome: Different pollutants show same impact

    At concentrations present in the environment, each of three dissimilar toxic agents can seize control of a signaling pathway that regulates developing cells in the brain and spinal cord, researchers report. They suggest that scientists might use the pathway to predict the toxicology of a diverse range of chemicals.

    Mark Noble of the University of Rochester Medical Center in New York and...

    02/28/2007 - 12:11 Earth & Environment
  • News

    Natural-Born Addicts: Brain differences may herald drug addiction

    Differences in the behavior and the brain receptors of rats seem to predict which of the rodents will become cocaine addicted, scientists report. The finding supports the idea that some people are predisposed to drug addiction.

    Scientists have long suspected that certain personality traits, including thrill seeking, impulsivity, and a tendency to be antisocial, go hand in hand with drug...

    02/28/2007 - 11:56
  • News

    Stormy Weather in Space: Craft take panoramic view of solar eruptions

    Even at its most quiescent, the sun hurls into space a billion-ton cloud of charged particles every 2 days or so. The few particles that strike our planet can disrupt satellites and knock out power systems on the ground.

    Twin spacecraft have for the first time tracked these storms, known as coronal mass ejections, from their birth in the lower depths of the sun's atmosphere...

    02/28/2007 - 11:21 Planetary Science
  • News

    Snail Highways: By following trails, periwinkles save slime

    A seaside snail crawling along the gooey streak left by another snail is saving a lot of energy, say researchers, because it doesn't have to ooze so much slime itself.

    Scientists have observed various kinds of snails following each others' paths, says Mark S. Davies of the University of Sunderland in England. Now, he proposes that followers are economizing on mucus. Davies and his...

    02/28/2007 - 10:56 Animals
  • News

    The New Black: A nanoscale coating reflects almost no light

    The velvet background on a painting of Elvis looks black because it reflects so little light. But getting a surface to reflect no light at all is surprisingly difficult. Now, researchers have created a virtually reflectionfree surface by coating it with filaments only a few billionths of a meter thick.

    Improved antireflective surfaces might have many uses. For example, they...

    02/28/2007 - 10:30 Materials
  • News

    Tools for Prey: Female chimps move to fore in hunting

    For the first time, researchers have observed wild chimpanzees making and using tools for hunting. What's more, it's mostly the female chimps and juveniles that adopt this style of attack, which occasionally nabs a small mammal that the chimp then eats.

    The discovery that tool-assisted hunting among chimps includes females and youngsters challenges the traditional idea that...

    02/28/2007 - 10:17 Anthropology
  • News

    Nice Shot: Hepatitis E vaccine passes critical test

    An experimental vaccine for hepatitis E has proved nearly 96 percent protective in a test among soldiers in Nepal. The results set the stage for a final trial that could lead to commercialization of the vaccine, the first to be developed against this virus.

    Other hepatitis vaccines don't work against hepatitis E, and there's no effective treatment for the disease that it causes. By some...

    02/28/2007 - 09:50 Biomedicine
  • Letters to the Editor

    Letters from the March 3, 2007, issue of Science News

    Up, down, around

    I haven't seen any reference to the similarity between the "morphing" wing ("Ahead of the Curve: Novel morphing wing may reduce aircraft's fuel use," SN: 12/23&30/06, p. 406) and the "warping" wing that the Wright brothers used on their gliders and powered aircraft. It seems we've come full circle in our quest to emulate the flight of birds.


    02/26/2007 - 15:06 Humans & Society
  • News

    Cocoa compound increases brain blood flow

    From San Francisco, at a meeting of the American Association for the Advancement of Science

    Cocoa that retains compounds usually removed to soften the product's flavor can significantly improve blood flow to the brain, say researchers. The finding could eventually lead to treatments for a variety of ills, including strokes and dementia.

    Since the early 1990s, Norman Hollenberg of...

    02/26/2007 - 11:17 Nutrition