NASA's Oldest Active Astronaut Retires

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The Year in Science with NPR's Ira Flatow

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New Galaxies Found in Earth's Backyard

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NASA Chief to Take Post at Louisiana State

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NASA Chief O'Keefe Will Reportedly Step Down

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Report: Robotic Hubble Mission Likely to Fail

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Report Suggests Remote Object Had Warmer Past

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Report Discourages NASA Plan to Save Hubble

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Looking for Water on the Red Planet

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Physicists Decry Bush's Mars Mission Plan

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NASA Scramjet Sets a New Air-Speed Record

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Aurora Borealis Lights Up the U.S. Sky

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