Leslie Morgan Steiner shares her story of domestic abuse at TEDxRainier. TED hide caption

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Philip Zimbardo explains his infamous Stanford Prison experiment at a TED conference. Andrew Heavens/Courtesy of TED hide caption

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David Oliver sits quietly as he waits for the results of a scan at Ellis Fischel Cancer Center in Columbia, Mo., in 2012. The University of Missouri research professor was diagnosed with cancer in September 2011. He broke the news to colleagues via a video on the Internet. Jeff Roberson/AP hide caption

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In Wyoming, a gun is used in about three-quarters of all suicides. Nationally, guns are used about 50 percent of the time. Spencer Platt/Getty Images hide caption

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A towel covers the face of a man in a geriatric day care facility of the German Red Cross at Villa Albrecht in Berlin. Carsten Koall/Getty Images hide caption

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Social worker Nuria Casulleres shows a portrait of Audrey Hepburn to elderly men during a memory activity at the Cuidem La Memoria elderly home in Barcelona, Spain, last August. The home specializes in Alzheimer's patients. David Ramos/Getty Images hide caption

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A recent study finds that relatives present during resuscitation attempts suffer fewer psychological effects later. istockphoto.com hide caption

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A JAMA Psychiatry study found that 1 in 7 mothers are affected by postpartum depression. iStockphoto.com hide caption

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Chewed pencils iStockphoto.com hide caption

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Bonobos share a piece of fruit at the Lola ya Bonobo sanctuary in the Democratic Republic of Congo. Jingzhi Tan/Duke University hide caption

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