News

  1. Physics

    Sunlight Sponge? Energy trackers gauge water vapor’s wild dance

    Atmospheric water vapor takes in more solar radiation than has been indicated by measurements and models, but laser probes of highly agitated water molecules suggest that the vapor doesn't absorb enough radiation to explain the discrepancy fully.

    By Peter Weiss
  2. Ecosystems

    Pfiesteria’s Bite: Microbe may kill fish by skinning, not poisoning

    At least one kind of Pfiesteria—accused of killing fish and threatening human health—does not produce a toxin but kills by eating holes in fish's skin, some researchers say.

    By Susan Milius
  3. Health & Medicine

    Fullness Factor: Gut hormone tells brain the stomach is well fed

    A hormone produced by the intestines could be the primary satiety signal sent to the brain.