As you walk, body weight passes through the base of the big toe. So that's where your shoe should bend. Courtesy of Emily Cook hide caption

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Over a third of U.S. adults are now getting their shots in places other than a doctor's office, like at this CVS store in Rockville, Md. Evan Vucci/AP hide caption

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Making up sleep during the day didn't reduce the risk that kids in the study would gain weight. Jacquelyn Martin/AP hide caption

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For women who carry certain genes, getting a double mastectomy before anything shows up on a mammogram may reduce breast and ovarian cancer risk. Damian Dovarganes/AP hide caption

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"I still have, on some days, a wonderful relationship with my daughter," Taryn Cregon says of Zoe, 13. "But it goes from this really back-and-forth, loving relationship to almost seeming like that person looks at you like you're enemy No. 1." Courtesy of Taryn Cregon hide caption

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A group of teenagers take a morning jog at the Wellspring Academy in Reedley, Calif., in 2009. The school specializes in helping teens and college students lose weight. A new study shows teens who remain obese risk a lifetime of chronic health problems and poverty. Justin Sullivan/Getty Images hide caption

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This tiny telescope gets implanted in one eye and magnifies the image to make up for "holes" in the person's vision. It can greatly improve sight for some people with age-related macular degeneration. Courtesy VisionCare Ophthalmic Technologies hide caption

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