News

  1. Health & Medicine

    Cloning’s ups and downs

    Dolly, the world's first cloned mammal, has developed arthritis, and two biotech firms have turned to cloning in their attempt to create pigs with organs that human bodies won't reject when transplanted.

    By John Travis
  2. Health & Medicine

    Cancer fighter reveals a dark side

    Overactivity of a tumor-suppressing gene shortens the lifespan of mice.

    By John Travis
  3. Anthropology

    Stone Age signs of complexity

    Ancient engravings found in South Africa support the theory that humans began to think and behave in symbolic ways a surprisingly long time ago.

    By Bruce Bower
  4. Anthropology

    The gene that came to stay

    A gene thought by some scientists to foster a bold, novelty-seeking personality, as well as attention-deficit hyperactivity (ADHD), apparently spread substantially in human populations over roughly the past 40,000 years.