News

  1. Animals

    Unway Sign: Ant pheromone stops traffic

    Researchers have found a new kind of traffic sign on ant trails, a chemical "Do not enter" that keeps foragers from wasting their time on paths that don't lead to food.

    By Susan Milius
  2. Earth

    Roots of Climate: Plants’ water transport cools Amazon basin

    Field tests in the Amazon have for the first time measured daily and seasonal movements of soil moisture through the deep roots of trees.

    By Sid Perkins
  3. Materials Science

    Atom Hauler: Molecular rig snags multi-atom loads

    Specialists in atomic-scale construction can now use a new molecule to gather small groups of atoms and drop them, as clusters, at specific locations.