Elizabeth Blackburn, professor of biochemistry and biophysics at the University of California at San Francisco. Photo/REUTERS

The Big Story

Three Americans win 2009 Nobel for medicine

Posted 5/10/2009

Three American scientists won the 2009 Nobel prize for medicine or physiology on Monday for their discovery of how chromosomes are copied and protected, work that cast light on cancer and the aging process....

Alternative text.
Alternative text.
Alternative text.
Alternative text.