Rajendra K. Pachauri speaks at the U.N. Climate Change Conference in Lima, Peru, on Dec. 11, 2014. He is stepping down as chairman of the Intergovernmental Panel on Climate Change. Juan Karita/AP hide caption

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A Falcon 9 SpaceX rocket stands ready for a sunset launch from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla., on Sunday. It will be carrying aloft the DSCOVR satellite. John Raoux/AP hide caption

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NASA says this "blue marble" image is the most detailed true-color image of the entire Earth to date. NASA hide caption

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Satellite Set To Stream Daily Images Of Earth From Space

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Former Vice President Al Gore. Jon Kalish/NPR hide caption

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Al Gore: Most Americans Still Agree Climate Change Is Getting Worse

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Who will be Romney's VP? The naming of his running mate is likely going to come in mid-August, after his foreign trip and the conclusion of the Olympics. Ken Rudin collection hide caption

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