Paul Rider runs on Mulholland Drive in Los Angeles, March 25, 2011. Researchers say a moderate running regimen is actually beneficial for the joints of people with healthy knees. Dennis J. Provost for NPR hide caption

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Put Those Shoes On: Running Won't Kill Your Knees

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Todd Woods and his sous chefs prepare baby greens for a quick saute at Restaurant Nora in Washington, D.C. Maggie Starbard/NPR hide caption

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Cooking Up Healthy Winter Greens At Nora's

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Despite Long Lives, Humans Age Like Other Primates

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Getting a Sense of How We Taste Sweetness

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Five-year-old Andy Villatoro plays with a toy he received with a Happy Meal at a San Francisco McDonald's last year. David Paul Morris/Getty Images hide caption

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Human Papillomavirus Infection And Cancer Risk

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