News

  1. Earth

    Atlanta leaves big chemical footprint

    A new analysis of water quality downstream of Atlanta shows that some pollutants from the city are still detectable in the river more than 500 kilometers away.

    By Sid Perkins
  2. Earth

    Amazon forest could disappear, soon

    A new model that includes a forest's effect on regional climate shows that the Amazon rainforest could disappear in the next three decades, much more rapidly than previously expected.

    By Sid Perkins
  3. Chemistry

    Wee dots yield rainbow of molecule markers

    Chemists report a scheme for creating a versatile color-based tagging system out of tiny atomic clusters, called quantum dots, that may enable scientists to track biomolecules with more finesse than ever.