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Your search has returned 38 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