A study of this champion's heart helped prove the benefits of exercise
More than a 100 years ago, doctors thought that too much running or other vigorous activity could harm us. Marathoner Clarence DeMar proved them wrong.
history of science
Clues to Bronze Age cranial surgery revealed in ancient bones
Archaeologists have discovered evidence of a rare type of skull surgery dating back to the Bronze Age that's similar to a procedure still being used today.
'Doctors Blackwell' Tells The Story Of 2 Pioneering Sisters Who Changed Medicine
Elizabeth Blackwell was the first woman in America to earn her medical degree. Her sister Emily followed in her footsteps. Janice Nimura tells the story of the "complicated, prickly" trailblazers.