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  1. Earth

    Tox Town

    This Web site from the U.S. National Library of Medicine offers an interactive introduction to toxic chemicals and environmental health risks that people might encounter in everyday life and in everyday places. The site includes many links to additional information and a section for teachers. Go to: http://toxtown.nlm.nih.gov/

    By Science News
  2. Tech

    Long-Sought Laser? Standard microchips may gain speedy optical connections

    Although not made exclusively of silicon, a new type of laser runs on electricity and could be mass manufactured in the same factories as silicon microchips are.

    By Peter Weiss
  3. Paleontology

    Flying with Their Legs: Hind feathers made primitive bird nimble

    The earliest-known bird had feathers on its legs that may have provided lift for flight, improving its maneuverability.