The Orbiting Carbon Observatory-2 will monitor carbon dioxide emissions. jhoward/NASA/JPL hide caption

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jhoward/NASA/JPL

Carbon-Sensing Satellite Prepares For Second Launch

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NASA Explores A New World: Crowdsourcing Ideas

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Katherine Streeter for NPR

Online Psychotherapy Gains Fans And Raises Privacy Concerns

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Curious Father Decodes His Unborn Son's DNA

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Nasa Bends The Rules To Get Two Rovers To Mars

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Over the past century and a half, visitors have traveled through Yosemite on foot, by carriage, by tram and by car. Now some regions will be once again be accessible only by foot, to protect delicate regions of the park. Courtesy Yosemite National Park Research Library/KQED hide caption

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Courtesy Yosemite National Park Research Library/KQED

As Yosemite Park Turns 150, Charms And Challenges Endure

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Martha looks just as good today as she did in 1914. Elizabeth O'Brien/Smithsonian Institution hide caption

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Elizabeth O'Brien/Smithsonian Institution

Lone Passenger Pigeon Escapes Pie Pan, Lands In Smithsonian

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If They Want To Make Anything, Proteins Must Know How To Fold

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Portugal's Cristiano Ronaldo takes a water break during the 2014 World Cup soccer match between Portugal and the U.S. in Manaus, Brazil, on June 22. Siphiwe Sibeko/Reuters/Landov hide caption

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Siphiwe Sibeko/Reuters/Landov

Michael Yezzi raises 1,000 pigs a year in Shushan, N.Y. He's worried about how to keep his farm safe from a disease that has no proven cure. Abbie Fentress Swanson for NPR hide caption

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Abbie Fentress Swanson for NPR

As Pig Virus Spreads, The Price Of Pork Continues To Rise

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