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National Academy of Sciences

A doctor examines a patient's brain. (credit: Mauricio Lima/AFP/Getty Images)

Young Athletes Hesitant To Report Concussions

A study released Wednesday discovered that research about youth concussions is limited, and more studies are needed to determine the effects of concussions on children.

10/31/2013

Republican Candidates Campaign At Iowa State Fair

Perry Says He Doesn’t Believe In Global Warming

GOP presidential candidate Rick Perry told New Hampshire voters Wednesday that he does not believe in man-made global warming, calling it a scientific theory that has not been proven.

08/17/2011