Tulip Courtesy of Benjamin Swett hide caption

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Even during sleep, babies' brains continue to take in and process angry voices. iStockphoto.com hide caption

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Marco Santiago plays a quijada in his home. Farida Jhabvala Romero/Radio Bilingue hide caption

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Karl and Twilla Eisele, of Wellsville, Kan., leave the old Brown School after voting on Nov. 6, 2012, in rural Wellsville, Kan. Recent elections have made the Kansas Legislature the most conservative in the state's history. Charlie Riedel/AP hide caption

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A baby receives a polio vaccine at the Medina Maternal Child Health center in Mogadishu, Somalia, on Wednesday. Somalia has one of the lowest immunization rates in the world. Ben Curtis/AP hide caption

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Jeffrey Bronfman, UDV church national vice president; Solar Law, UDV church national president; and Tai Bixby, head pastor of the Santa Fe congregation. Churchgoers participate in a ceremony where hallucinogenic huasca tea is consumed, and some neighbors are trying to block the construction of a UDV temple. John Burnett /NPR hide caption

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Luis Fernando Vasquez has been a coffee farmer in the central valley of Costa Rica his entire life. Dan Charles/NPR hide caption

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Coffee beans are raked to dry in the sun in western Guatemala. David Gilkey/NPR hide caption

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First-time homeowner Amanda Cowley in her new home in the Bloomingdale neighborhood of Washington, D.C. After married couples, single women are the largest demographic group of homebuyers. Gabriella Demczuk /NPR hide caption

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A dispute over Texas' access to the Kiamichi River, which is located in Oklahoma, has started a longer legal battle that is headed to the Supreme Court. Joe Wertz for NPR hide caption

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Flames engulf the Branch Davidian compound in Waco, Texas, on April 20, 1993. A 51-day standoff at the compound ended in a fire and the deaths of about 80 sect members, including two dozen children. Susan Weems /AP hide caption

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Life Pieces to Masterpieces is an arts program that serves the neighborhood of Ward 7 in Washington, D.C. Boys work with mentors to create works of art. Lizzie Chen /NPR hide caption

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A DJ plays for a crowded street at Oakland's Art Murmur celebration in February. David Kashevaroff hide caption

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Martin Luther King Jr., with the Rev. Ralph Abernathy (center) and the Rev. Fred Shuttlesworth, defied an injunction against protesting on Good Friday in 1963. They were arrested and held in solitary confinement in the Birmingham jail where King wrote his famous "Letter From Birmingham Jail." Courtesy of Birmingham Public Library Archives hide caption

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