Ronald Heifetz draws on his training as a psychiatrist to coach aspiring leaders at Harvard's John F. Kennedy School of Government. Ben de la Cruz/NPR hide caption

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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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When it comes to nature versus nurture, brain scientists think both matter. Daniel Horowitz for NPR hide caption

itoggle caption Daniel Horowitz for NPR

Football fans ate fattier meals the day after their teams lost a game, a study found. hide caption

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Security guards stand outside newspaper offices in Guangdong province in January, where banners and flowers were laid in protest of censorship. AP hide caption

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The poor tend to value social connections, psychologists say. But as people become wealthy, they need one another less and — according to some scientists — make fewer connections. hide caption

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Girls are more likely to take high school physics if they see women in their communities working in science, technology, engineering and math, a new study finds. Dominik Pabis/ hide caption

itoggle caption Dominik Pabis/

Student Kahlil Quato fights tears as he speaks at a University of Chicago candlelight vigil in 2007. The service was held in remembrance of Amadou Cisse, a graduate student, who was shot to death at point-blank range. Stacie Freudenberg/AP hide caption

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Happy Birthday: Cake, candles and cone-shaped hats make regular appearances at birthday parties. What gives? William Gottlieb/Corbis hide caption

itoggle caption William Gottlieb/Corbis

Opponents of same-sex marriage participate in the March for Marriage in Washington, D.C., on March 26, as the Supreme Court hears arguments on California's Proposition 8 ban on same-sex marriage. Nicholas Kamm/AFP/Getty Images hide caption

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One contemporary analysis links the increase in gender equality in a society with increased sexual empowerment of women and less sexual coercion. But there's more to it than that. hide caption

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