United States-Science & Health
  • Fighting the problem of fake drugs will require putting medications through a chain of custody like U.S. courts require for evidence in a trial.

    LAST UPDATE : Feb 13, 2013, 12:52 PM EST
  • This undated file photo from the Colorado State Forest Service shows pine trees killed by beetles near Grandby, Colorado.

    Big changes are in store for the nation's forests as global warming increases wildfires and insect infestations.

    LAST UPDATE : Feb 06, 2013, 4:45 PM EST