News

  1. Earth

    Amazon basin is wetter now than in past

    Sediments from the Atlantic Ocean indicate that the now lush Amazon Basin was much drier during the latest ice age.

    By Sid Perkins
  2. 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
  3. Chemistry

    For a better smile, have some wasabi

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

    By Jessica Gorman
  4. Chemistry

    Where the tire meets the conveyor belt

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