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  1. Humans

    Letters from the June 12, 2004, issue of Science News

    Go with the flow In “Tales of the Undammed: Removing barriers doesn’t automatically restore river health” (SN: 4/10/04, p. 235: Tales of the Undammed), the photo comparison of the dam site is deceptive because the two photos of the same spot appear to have been taken during different seasons. Hence, the lower photo shows a […]

    By Science News
  2. Tech

    DNA puts its best foot forward

    A robot made of DNA has taken its first steps, suggesting that such devices could eventually be used for nanoscale manufacturing.

    By Alexandra Goho

  3. Chimp DNA yields complex surprises

    A molecular comparison of chromosome 22 in chimpanzees with its counterpart in people reveals surprisingly complex genetic differences between the two species.