News

  1. Earth

    Double Trees: City trees grow bigger than country cousins

    Clones of an Eastern cottonwood grow twice as well in the New York metropolitan sprawl as in rural New York State.

    By Susan Milius
  2. Paleontology

    Secrets of Dung: Ancient poop yields nuclear DNA

    Researchers have extracted remnants of DNA from cells preserved in the desiccated dung of an extinct ground sloth.

    By Sid Perkins
  3. Astronomy

    Record Breaker: A planet from the early universe

    Astronomers have found the oldest and most distant planet known in the universe.

    By Ron Cowen
  4. Animals

    Killer sex, literally

    Videotapes of yellow garden spiders show that if a female doesn't murder her mate, he'll expire during sex anyway.