News

  1. Animals

    Killer Flatworm: New species hunts with puffer fish toxin

    A newly described marine flatworm from Guam hunts with the same toxin that a puffer fish uses. With video.

    By Susan Milius
  2. Health & Medicine

    Not So Sweet: Cancers in rats that consumed aspartame

    A large, new study in rats suggests that the artificial sweetener aspartame may be a carcinogen, but critics question the finding's validity.

    By Ben Harder
  3. Astronomy

    Radio Daze: Staccato pulses suggest a new stellar class

    Astronomers have discovered what may be a new class of star that emits bursts of radio waves for 2 to 30 milliseconds before falling silent for minutes to hours.