Uncategorized

  1. Earth

    Nickel down, oxygen up

    Researchers point to the early ocean's concentration of nickel as the possible start for events that allowed Earth's atmosphere to accumulate oxygen.

    By Solmaz Barazesh
  2. Life

    Male chimps exchange meat for sex

    A long-term study of chimps living in western Africa indicates that males hunt down monkeys not only to eat their meat, but also to exchange the meat for sex with female chimps.

    By Bruce Bower
  3. Animals

    Sonar causes rock-concert effect in dolphins

    Test of recorded sonar causes temporary hearing impairment in dolphins.

    By Susan Milius
  4. Life

    Primate vision puts pieces together

    Study suggests nerve cells in retinas create an intricate system of interlocking receptive fields.