NASA's Oldest Active Astronaut Retires
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The Year in Science with NPR's Ira Flatow
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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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