Uncategorized

  1. 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
  2. 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.

    By John Travis
  3. Astronomy

    Visible Matter: Once lost but now found

    New observations confirm that most of the visible matter in the universe lies hidden in vast, hard-to-detect gas clouds between galaxies.

    By Ron Cowen
  4. Plants

    Recent tree scourge poses garden threat

    Lab tests suggest that a lethal disease of oak trees in California and Oregon could strike some popular garden shrubs in the rhododendron family.