Uncategorized

  1. Earth

    Explorers pinpoint source of the Amazon

    A five-nation team of explorers has used Global Positioning System equipment to confirm that the source of the Amazon is a snowmelt-fed stream high in the Peruvian Andes.

    By Sid Perkins
  2. Chemistry

    For a better smile, have some wasabi

    Chemicals in the Japanese condiment wasabi could help prevent tooth decay.

    By Jessica Gorman
  3. Chemistry

    Where the tire meets the conveyor belt

    A new, noninvasive technique could detect an impending failure in a rubber tire or conveyor belt.

    By Jessica Gorman
  4. Health & Medicine

    Cocaine link to heart attack bolstered

    Regular cocaine use may account for one-fourth of nonfatal heart attacks in people under age 45.