News

  1. Dieting to Save a Species: Mother parrots that eat less avoid excess of sons

    New Zealand's endangered, flightless parrot population is recovering from a shortage of daughters now that conservationists are counting calories for the mothers.

    By Susan Milius
  2. Astronomy

    Cosmic Push: Finding pieces of a dark puzzle

    A controversial new study, the first to use gamma-ray bursts to measure the expansion of the universe far back in time, hints that dark energy may not be constant in time.

    By Ron Cowen
  3. Health & Medicine

    Defenses Down: Mutation boosts West Nile risk

    A genetic mutation has been identified that increases a person's susceptibility to West Nile virus.

    By Nathan Seppa
  4. Astronomy

    Images reveal possible origin of young stars

    Astronomers say they have solved the riddle of how young, massive stars can reside so close to the monster black hole at the Milky Way's center.