When anthropologists tallied the use of emotional words through a century of literature, they included many books without clear emotional content — technical manuals, for example, and automotive repair guides. Steve Debenport/iStockphotography hide caption

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Frequent spitting up affects about half of babies under six months, but it's usually not gastroesophageal reflux disease, or GERD. iStockphoto.com hide caption

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When Melissa McCann (left) suffered a stroke in 2007, her twin sister, Terry Blanchard, helped her make a full recovery. McCann is now back to work as a flight nurse with Life Flight at the Eastern Maine Medical Center in Bangor. David Wright/Redux Pictures for NPR hide caption

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Reducing dietary salt and alcohol, exercising, not smoking and maintaining a healthy weight are other lifestyle tweaks known to help prevent or reduce high blood pressure, doctors say. David McNew/Getty Images hide caption

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Joy Reynolds of San Diego looks at the newspapers on display at the Newseum in Washington, D.C., on June 29, 2012, following the Supreme Court ruling on President Obama's health care law. David Goldman/AP hide caption

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Dr. Nayna Patel performs an ultrasound exam on Rinku Macwan, at a hospital near Ahmedabad, India. It's illegal in India for doctors to reveal a baby's sex during these exams, but many do it anyway. Sam Panthaky/AFP/Getty Images hide caption

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A worker stands on top of a storage bin on July 27, 2011, at a drilling operation in Claysville, Pa. The dust is from powder mixed with water for hydraulic fracturing. Keith Srakocic/AP hide caption

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A new study from the Centers for Disease Control and Prevention finds no link between the number of vaccinations a young child receives and the risk of developing autism spectrum disorders. Jeff J. Mitchell/Getty Images hide caption

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