News

  1. Quantum Physics

    Light breaks up to cloak gaps in time

    Method could hide messages without sender’s knowledge.

    By Andrew Grant
  2. Paleontology

    Fossil sheds light on early primates

    Partial skeleton near root of monkey, ape and human line.

    By Bruce Bower
  3. Animals

    Dead, live guppies vie for paternity

    Females can use sperm months after mates go belly up.

    By Susan Milius
  4. Health & Medicine

    Flu spreads via airborne droplets

    Hand washing goes only so far in retarding flu transmission.

    By Tina Hesman Saey
  5. Humans

    Dietary changes accompanied human evolution

    Hominids moved toward eating grasses and away from tree leaves, according to chemical analyses of fossil tooth enamel.