NASA's launch of the Mars Science Laboratory -- hampered by technical difficulties and cost overruns -- has been delayed until the fall of 2011, NASA officials said at a news conference Thursday in Washington. Read More »

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NASA officials Sunday waved off the first opportunity for space shuttle Endeavour to return to Earth, citing poor weather conditions. Read More »

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From a remote valley in Northern California, Jill Tarter is listening to the universe. Read More »

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Scientists have switched off several on-board instruments to halt rising temperatures inside India's first unmanned lunar spacecraft. Read More »

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