What makes the Mona Lisa — or any piece of art — successful? Sergio Velayosf/Flickr hide caption

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Your Health

Good Art Is Popular Because It's Good. Right?

Research suggests that after a basic standard of quality is met, what becomes a success and what doesn't is essentially a matter of chance.

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Having a perfect memory can put a strain on relationships, because every slight is remembered. Katherine Streeter for NPR hide caption

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Ellie is a computer simulation designed to engage real people in meaningful conversation and take their measure. The computer system looks for subtle patterns in body language and vocal inflections that might be clues to underlying depression or other emotional distress. YouTube hide caption

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Jillian Blenis, 30, of Boston reacts while stopping at a makeshift memorial to marathon bombing victims Wednesday. Julio Cortez/AP hide caption

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Researchers say that aggressive people tend to interpret ambiguous faces as reflecting hostility. iStockphoto.com hide caption

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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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Samantha Grimaldo was born with a rare disorder, Perisylvian syndrome, and has never been able to speak. Ellen Webber for NPR hide caption

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For some kids who grow up in poverty, the bond developed with Mom is especially important in dealing with stress. iStockphoto.com hide caption

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Notice anything unusual about this lung scan? Harvard researchers found that 83 percent of radiologists didn't notice the gorilla in the top right portion of this image. Trafton Drew and Jeremy Wolfe hide caption

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Could you say "no" to this face? Christoph Bartneck of the University of Canterbury in New Zealand recently tested whether humans could end the life of a robot as it pleaded for survival. Christoph Bartneck hide caption

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People visit a memorial outside Sandy Hook Elementary School in Newtown, Conn., on Dec. 15. Spencer Platt/Getty Images hide caption

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