By peering deep into evolutionary history, scientists at the University of California, Santa Barbara have discovered the origins of photosensitivity in animals.

  The often counterintuitive world of quantum mechanics might appear to be the reserve of theoretical physicists pondering the possibility of parallel universes but here is an experiment demonstrating effects of quantum mechanics that everybody can do at home.

  Julio and Mauricio Cabrera are gay brothers who are convinced their sexual orientation is as deeply rooted as their Mexican ancestry.

  Civil war in the Congo has cut off the silverback gorilla from conservationists trying to save it.

  A swimming sea cucumber, a Nemo-like orange fish and a worm with tentacles sprouting from its head are among dozens of possible new species found during a survey of the Celebes Sea, researchers said Tuesday.

  Apple Inc.'s next-generation operating system, Mac OS X "Leopard," will be available in Oct.

  When Apple opened its iTunes Plus store, which sells unprotected music in AAC format from EMI, it priced songs at $1.29 --- a premium price based on the lack of DRM. Since then, however, Amazon.com has opened its Amazon MP3 store, selling songs in MP3 format for 99¢. In response, Apple Tuesday lowered its iTunes Plus prices to 99¢.

  It was sensational stuff that riveted a nation: A mild-mannered American doctor poisons then dismembers his unfaithful wife, flees England in disguise with his mistress -- and is caught, tried and hanged.

  State underwater archaeologists on Monday raised a cannon from a sunken ship that could have belonged to the pirate Blackbeard.

  A Japanese-U.S. study suggested that a mechanism that repairs damaged DNA might malfunction and result in breast cancer.