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. Fri, 05 Dec 2008 10:34:54 EST

NASA officials Sunday waved off the first opportunity for space shuttle Endeavour to return to Earth, citing poor weather conditions. Mon, 01 Dec 2008 00:17:51 EST