• A study of former NFL players finds they were unusually prone to dying from degenerative brain disease, the latest indication that repeated blows to the head may cause serious trouble later on.

    LAST UPDATE : Dec 06, 2012, 10:30 AM EST
  • Scientists have created the first comprehensive view of how human DNA works. And they say it will rewrite the textbooks and give valuable new insights into the biology of what goes wrong in disease.

    LAST UPDATE : Dec 06, 2012, 9:30 AM EST