News

  1. Animals

    Virgin Birth: Shark has daughter without a dad

    DNA testing of two sharks confirms an instance of reproduction without mating, adding a fifth major vertebrate lineage to those known for occasional virgin births.

    By Susan Milius
  2. Planetary Science

    Violent Past: Young sun withstood a supernova blast

    A big bully pummeled the infant solar system, first by blasting it with a massive wind, then by exploding nearby, driving shock waves into the fledgling solar system and irrevocably altering its chemistry.

    By Ron Cowen
  3. Physics

    The dance of the electron spins

    Physicists have used a novel measuring technique to track the motions of electron spins in a tiny magnet as its polarity flips, with north and south poles changing places.