A pro-gay-marriage protester stands in front of the Supreme Court on Tuesday, the first of two days of oral arguments on challenges to laws that limit the definition of marriage to unions of a man and a woman. Karen Bleier/AFP/Getty Images hide caption

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DOMA Challenge Tests Federal Definition Of Marriage

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Think Again Giovanni Moltoni
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Dream Catcher Giovanni Moltoni
Any Way You Can Cyrus Chestnut & Joe Lovano
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Cyrus Chestnut
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The Journey Cyrus Chestnut & James Carter
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Azul Para Amparo Charlie Musselwhite
Hard Times Charlie Musselwhite

For the first time, new nationwide science standards recommend teaching K-12 students about climate change. iStockphoto.com hide caption

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A Hot Topic: Climate Change Coming To Classrooms

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Escapist Gojogo
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Yekermo Gojogo
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Meister Petz [Beanfield Remix] Peace Orchestra
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Shining [Trüby Trio Treatment] Peace Orchestra
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In Hindsight Edgar Meyer
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Palmyra Béla Fleck & Edgar Meyer
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In Long Beach, Wash., Chinook Observer editor and publisher Matt Winters has overseen his paper's transition to the Internet and, more recently, to a pay wall. Ashley Gross for NPR hide caption

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Looking For 'Oxygen,' Small Papers Erect Digital Pay Walls

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The Trails Tommy Emmanuel
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Little By Little
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Jack Magic Tommy Emmanuel
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Jack Magic
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Little By Little
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Desperation Breeds Andrew Bird
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Near Death Experience Experience Andrew Bird
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The Solar Impulse, a solar-powered plane, flies over Switzerland. The makers will be journeying across the U.S. this spring, hoping the flight helps challenge assumptions about what solar technology can do. Courtesy of Solar Impulse hide caption

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Solar-Powered Plane Uses Its Lightness To Fly In The Dark

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University of Washington computer science student Laura McFarlane and her team work on their smartphone app aimed at helping girls being illegally trafficked get help. Sara Lerner/NPR hide caption

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More Than Just Angry Birds, Apps Can Have A Humanitarian Side Too

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Great Round Burn Kaki King
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Cargo Cult Kaki King
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This photo illustration released by Adidas shows the uniforms for NCAA basketball teams (from left) University of Cincinnati, University of Kansas, University of Notre Dame, Baylor University, UCLA and the University of Louisville. Aaron Hewitt/AP hide caption

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It's Been An Ugly Year For College Basketball

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Loving You is the Only Way To Fly Nashville Cast, Clare Bowen et. al.
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Concert Duo Movement 4 Joshua Bell & Edgar Meyer with Sam Bush & Mike Marshall
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