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Friday

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

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Stephen Dunn/Getty Images

Janet Yellen smiles as President Obama announces her nomination for Federal Reserve chairwoman on Oct. 9. Jewel Samad/AFP/Getty Images hide caption

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Jewel Samad/AFP/Getty Images

After Overcoming Early Obstacles, Yellen Assumes Fed's Top Job

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Cannonball jellyfish soak up the sun on a South Carolina beach. Fishermen are now pursuing the pest that used to clog their shrimping nets. Courtesy of Steven Giese hide caption

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Courtesy of Steven Giese

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

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Carolyn Kaster/AP

Gund Kwok troupe member Heang Ly takes a break next to her lion costume during a rehearsal in Boston's Chinatown. Hansi Lo Wang/NPR hide caption

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Hansi Lo Wang/NPR

A protest of the Keystone XL pipeline last March along its proposed route near Bradshaw, Nebraska. NH/AP hide caption

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NH/AP

Andrew Ng and Daphne Koller, Stanford University computer science professors who started Coursera, pose for a photo at the Coursera office in Mountain View, Calif., on Aug. 2, 2012. Jeff Chiu/AP hide caption

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Jeff Chiu/AP

Dark blue: It's going to take a foot or more of snow to close schools. Green: Any snow's going to shut things down. reddit.com/user/atrubetskoy hide caption

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reddit.com/user/atrubetskoy