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Your search has returned 5 articles:
  • Feature

    Armor-Plated Puzzle

    A few years after Francis H. Crick and James D. Watson unveiled the structure of DNA in 1953, they rocked the fledgling field of molecular biology again with a bold notion: Viruses are, in part, structured as crystals are. That idea captivated Donald L.D. Caspar and Aaron Klug, who then systematically applied what they knew about crystal geometry to classify and predict the structures that...

    08/29/2005 - 10:49 Numbers
  • Feature

    Empty Nets

    In the 1850s, 43 schooners from a single port, Beverly, Mass., plied the North Atlantic's Scotian shelf, which is prime cod territory in Canadian waters. Over the sides of the ships, crews dropped lines with single hooks and doggedly jigged their bait along the seafloor to entice the big predatory fish. Although the combined fleet used fewer than 1,200 hooks, the ships' logs indicate that...

    05/31/2005 - 18:30 Ecology
  • News

    Small World After All: Short e-mail chains reach targets worldwide

    Six degrees of separation—the notion that every person on the planet can reach every other through a chain of about six social ties—has been borne out by the first large-scale study of social networks.

    The more than 24,000 e-mail users who participated in the study were randomly assigned one of 18 targets in 13 countries, including a police officer in Australia, a veterinarian in the...

    08/13/2003 - 14:13 Humans & Society
  • News

    Making machines from genes

    It's been a while since DNA just encoded genes. During the past decade, scientists have found ways to use this celebrity of molecular biology as an electrical wire (SN: 7/13/96, p. 26), a girder for making elaborate structures, and a computing device. (SN: 8/14/99, p. 104) (SN: 9/18/99, p. 181).

    In a new twist for the helical molecule, DNA takes on a role of power. It's the fuel...

    06/16/2003 - 15:05 Technology
  • News

    Flame retardants morph into dioxins

    From Hamburg, Germany, at a meeting of the Society of Environmental Toxicology and Chemistry–Europe

    Polybrominated diphenyl ethers (PBDEs) make up a family of common flame retardants for plastics, foams, and fabrics. Nearly ubiquitous in air and water, these pollutants have gained notoriety for accumulating not only in wildlife but also in human blood and breast milk (SN: 10/13/01, p....

    05/20/2003 - 13:01 Earth & Environment