Panel Clarifies Advice On Vitamin D Intake
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Senate OKs Bill Overhauling Food Safety Rules
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New Guidelines For Taking Vitamin D
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A man sunbathes in Malmo, Sweden, in July. Humans (and other animals) make vitamin D when exposed to sunlight. Johan Nilsson/AFP via Getty Images hide caption

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Medical Panel: Don't Go Overboard On Vitamin D
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A CT scan of the brain shows the cerebellum, a small portion of each temporal lobe, and the sinuses. Andrew Ciscel via Wikimedia Commons hide caption

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Megan Lindsey (right) and her friend Alexandria Bodfish at soccer camp at University of Notre Dame.  Megan, 14, suffered concussions twice this fall while playing soccer. Courtesy of Barbara Wirtz hide caption

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Parents, Coaches Worry About Concussion Risks
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Cycling has at least tripled over the past two decades in several big cities across the U.S., including Minneapolis, Chicago and San Francisco. Jonathan Steinberg hide caption

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Switching Gears: More Commuters Bike To Work
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Dr. Fauci Optimisitic About HIV Drug Truvada
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Monica Hanson (top left) is the eldest of four daughters and says she fell into the role of firstborn naturally. Her sisters (from left to right) are Elena Lynn, Maria Godoy (a senior editor at NPR.org) and Olga Czekalski. Also pictured (bottom left) is her daughter, Erica, and Erica's cousins Kelsey and Taylor Lynn. Courtesy of Monica Hanson hide caption

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How Much Does Birth Order Shape Our Lives?
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