Uncategorized

  1. Health & Medicine

    Sleep Time

    The International Sleep Medicine Association has created a Web site that brings together a wide variety of information sources concerning sleep health and sleep disorders. It includes access to online video lectures on various aspects of sleep, chat rooms and message boards, and links to news stories. Go to: http://www.1sleep.com/

    By Science News
  2. Math

    Crystal Möbius

    Take a ribbon of paper, twist one end 180 degrees, and attach it to the other end. The resulting surface, called a Möbius strip, has only one side and one edge. Scanning electron microscope image shows niobium selenide crystals in a Möbius-strip conformation (top). In the schematic diagram (bottom), a white ribbon represents a niobium […]

    By Ivars Peterson
  3. Chemistry

    Carbon nanotubes burn when flashed

    Carbon nanotubes can ignite when exposed to an ordinary camera flash.