News

  1. Astronomy

    Ordinary matter: Lost and found

    Astronomers believe they have finally found the whereabouts of most of the ordinary matter in the universe.

    By Ron Cowen
  2. Health & Medicine

    Abortion-cancer link is rejected

    A workshop report concludes that abortions do not increase a woman's chance of developing breast cancer.

    By John Travis
  3. Animals

    Vampire bats don’t learn from bad lunch

    For the first time, a mammal has flunked a controlled test for developing a food aversion after getting sick just once, and that unusual creature is the common vampire bat.

    By Susan Milius
  4. Health & Medicine

    Protective virus ties up HIV docking sites

    A harmless virus that seems to keep HIV infections from progressing to AIDS appears to do so by occupying key molecular receptors on immune cells.