In a last bout of campaigning before Christmas, Rep. Michele Bachmann of Minnesota signs autographs at the National Motorcycle Museum in Anamosa, Iowa, on Dec. 22.
Charlie Riedel/AP
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The cloud became a common term in 2011. Here, a screengrab from the Dropbox website shows how the cloud-based data storage service shares the same information on multiple devices.
NPR
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Novak Djokovic smiles with his U.S. Open trophy atop the Empire State Building in New York, Sept. 13, 2011. The Serbian defeated Rafael Nadal to win his first U.S. Open tennis championship and third Grand Slam trophy of 2011.
Seth Wenig/AP
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Laurel Fontaine, 16, (left) and her twin sister Heather. When Laurel was 11 years old, she suffered a stroke that destroyed 80 percent of the left side of her brain. The singing therapy helped her regain the ability to speak.
Ellen Webber for NPR
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People travelling through Philadelphia International Airport Terminal A West Transit Corridor. The airport is the 12th busiest in the world.
iStockphoto
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Leonardo DaVinci noted that when trees branch, smaller branches have a precise, mathematical relationship to the branch they sprang from.
iStockphoto.com
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Barrel racing champion Charmayne James rides during a demonstration at a new arena in Gretna, Fla., that plans to hold wagering on the sport.
Brendan Farrington/AP
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The Edge and Bono performing in June at the Oakland, Calif., stop of U2's 360˚ Tour — the most successful in history.
Tim Mosenfelder/Getty Images
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