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The upshot from a study of more than 75,000 low-risk births is that "childbirth in the United States is very safe regardless of where you decide to do it," says Dr. Michael Greene, who directs obstetrics at the Massachusetts General Hospital in Boston. Photofusion/UIG via Getty Images hide caption

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Photofusion/UIG via Getty Images

Giving Birth Outside A Hospital Is A Little Riskier For The Baby

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Geneticists found clues to a disease of iron storage in the remains of several Bronze Age inhabitants of what's now Rathlin Island in Northern Ireland. Chrisgel Ryan Cruz/Flickr hide caption

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Chrisgel Ryan Cruz/Flickr

Medical workers surround 34-day-old Noubia, the last known patient to contract Ebola in Guinea, as she was released from a Doctors Without Borders treatment center in Conakry on Nov. 28. Cellou Binani /AFP/Getty Images hide caption

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Cellou Binani /AFP/Getty Images

A/B Testing Goes Mainstream: Used By Stores, Campaigns, Even Schools

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How The Bias Known As Gambler's Fallacy Affects Our Lives

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Editing DNA has never been easier. Pasieka/Science Photo Library/Corbis hide caption

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Pasieka/Science Photo Library/Corbis

Gene Editing Tool Hailed As A Breakthrough, And It Really Is One

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The harmless mite Demodex folliculorum, seen here in an electron microscope image, lives in the follicles of eyelashes. Andrew Syred/Science Source hide caption

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Andrew Syred/Science Source

Millet isn't just one grain but, rather, a ragbag group of small-seeded grasses. Hardy, gluten-free and nutritious, millet has become an "it" grain in recent years. billy1125/Flickr hide caption

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FDA Approval Could Turn A Free Drug For A Rare Disease Pricey

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A team of pediatricians noticed that many of their young black and Hispanic patients were deficient in vitamin D. A hefty weekly dose of of the vitamin for two months was needed to get most of the teens' blood levels to the concentration that endocrinologists advise. Noel Hendrickson/Ocean/Corbis hide caption

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Noel Hendrickson/Ocean/Corbis

How Emotional Responses To Terrorism Shape Attitudes Toward Policies

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Age takes a toll on our internal clocks. Universal Stopping Point Photography/Getty Images hide caption

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Universal Stopping Point Photography/Getty Images

As Aging Brain's Internal Clock Fades, A New Timekeeper May Kick In

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iStockphoto

You Should Watch The Way You Punctuate Your Text Messages — Period

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