Sean Morey, then with the Arizona Cardinals, celebrates after blocking a punt against the Seattle Seahawks in 2007. Morey, who suffers from post-concussion syndrome, retired from the NFL in 2010 on the advice of doctors. Stephen Dunn/Getty Images hide caption

toggle caption Stephen Dunn/Getty Images

Linda Door protested outside the U.S. Supreme Court as it began hearing arguments on the constitutionality of the Affordable Care Act in March 2012. Carolyn Kaster/AP hide caption

toggle caption Carolyn Kaster/AP

"People like to share, if you give them the opportunity and the choice." — John Wilbanks James Duncan Davidson/TED hide caption

toggle caption James Duncan Davidson/TED

Democratic Rep. Henry Waxman of California stands in his Capitol Hill office beside a wall displaying his legislative accomplishments. Waxman, 74, said Thursday that he would retire after 40 years in the House of Representatives. J. Scott Applewhite/AP hide caption

toggle caption J. Scott Applewhite/AP

The Full House cast John Stamos, Bob Saget and Dave Coulier are featured in Dannon's Superbowl ad. OikosYogurt/Youtube hide caption

toggle caption OikosYogurt/Youtube

Shoppers check out vodka in a street kiosk in Moscow in 2008. Alexander Nemenov/Getty Images hide caption

toggle caption Alexander Nemenov/Getty Images
Katherine Streeter for NPR

The Institute of Medicine is reviewing how chronic fatigue syndrome is diagnosed and whether that label puts too much emphasis on fatigue over other significant symptoms. Daniel Horowitz for NPR hide caption

toggle caption Daniel Horowitz for NPR

Palestinian girls read the Koran at a camp in Gaza City, June 2012. In poor countries, boys are 20 percent more likely than girls to enroll in school, UNICEF says. Mahmud Hams/AFP/Getty Images hide caption

toggle caption Mahmud Hams/AFP/Getty Images

Charles, Prince of Wales, smells before tasting some ice cream during a visit to Gloucestershire. Maybe he was sniffing for fat? Barry Batchelor/Getty Images hide caption

toggle caption Barry Batchelor/Getty Images

Some men take testosterone hoping to boost energy and libido, or to build strength. But at what risk? iStockphoto hide caption

toggle caption iStockphoto

Playing outside can help kids — and their parents — maintain a healthy weight. iStockphoto hide caption

toggle caption iStockphoto

Love your hair. Artists' depictions of a Neanderthal man and woman at the Neanderthal Museum in Mettmann, Germany. Martin Meissner/AP hide caption

toggle caption Martin Meissner/AP

NPR thanks our sponsors

Become an NPR sponsor