Kids might be more satisfied if they get one good treat instead of one good treat and one lesser treat. hide caption

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The website has been linked to two bullying cases that led to suicides. Danny E. Martindale/Getty Images hide caption

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Among families with children age 8 and under, ownership of tablet devices has jumped fivefold since 2011, reports the nonprofit Common Sense Media. Jeremy Hiebert/Flickr hide caption

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Illustration by Daniel Horowitz for NPR

Ava Gene's, a Roman-inspired restaurant in Portland, Ore., incorporates colatura, a modern descendant of ancient Roman fish sauce, into several of its dishes. Deena Prichep/NPR hide caption

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This riboflavin-rich material can be used to print intricate, microscopic structures in three dimensions. Courtesy of North Carolina State University hide caption

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Anoushka Shankar's new album, Traces of You, comes out Tuesday. Harper Smith/Courtesy of the artist hide caption

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Clostridium difficile, a bacterium that causes severe diarrhea, can be difficult to treat with antibiotics. Stefan Hyman/University of Leicester hide caption

itoggle caption Stefan Hyman/University of Leicester