News

  1. Health & Medicine

    Some T cells may be a fetus’ best friend

    While pregnant, mice overproduce a kind of T cell that reins in other immune cells that might target the fetus.

    By Nathan Seppa
  2. Planetary Science

    A view of Mars, European style

    Although the Mars lander Beagle 2 is presumed dead, its mother craft, the European Space Agency's Mars Express, has transmitted its first data from a polar orbit about the Red Planet.

    By Ron Cowen
  3. Tech

    The rat in the hat

    A compact positron-emission tomography (PET) brain scanner may make possible studies of awake rats that link brain functions and behaviors.

    By Peter Weiss
  4. Health & Medicine

    Pill Puzzle: Do antibiotics increase breast cancer risk?

    A new study links antibiotic use to breast cancer, although it's not clear the drugs cause the disease.