Gastric bypass procedures (GBP) divide the stomach into a small "gastric" pouch and a much larger, lower "bypassed" pouch. The operation makes the stomach smaller and makes the patient feel full faster. /Ethicon Endo-Surgery Inc. hide caption

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An elderly couple holds hands while walking along a Berlin street. A recent study showed that walking grows the region of the brain that archives memories. Patrick Sinkel/AFP via Getty Images hide caption

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Sandy Palais, 73, of Arizona started lifting weights about 10 years ago after she was diagnosed with osteoporosis. Jason Millstein for NPR hide caption

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Does knowing the nutritional info for food options influence your choice? A McDonald's Egg McMuffin makes its case. Justin Sullivan/Getty Images hide caption

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According to the Bureau of Labor Statistics, 47 percent of moms were in the labor force in 1975. By 2008, that number rose to 71 percent. James Tutor/ hide caption

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Malcom Brown (left) is hit by Jake Smith on a kickoff return during a high school state championship game in Arlington, Texas, in December. Sports medicine professionals and the NFL are calling for tougher regulations on head injuries sustained by young athletes. Matt Strasen/AP hide caption

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