The NFL season kicked off September 5. The same day, the U.S. Centers for Disease Control and Prevention (CDC) issued a special report about NFL players' deaths from brain diseases.

Stem cell research holds the promise of changing the entire field of medicine. But research has been hampered because scientists haven't found a way to produce enough cells that can be studied safely.

Harry Potter scribe J.K. Rowling has donated £10 million to the University of Edinburgh to establish the Anne Rowling Regenerative Neurology Clinic.