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Mars Science Lab launch delayed two years
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.
iReporters watch planets, moon align
Shuttle lands at California air base
NASA officials Sunday waved off the first opportunity for space shuttle Endeavour to return to Earth, citing poor weather conditions.
Inspiration for 'Contact' still listening
From a remote valley in Northern California, Jill Tarter is listening to the universe.
Indian lunar orbiter hit by heat rise
Scientists have switched off several on-board instruments to halt rising temperatures inside India's first unmanned lunar spacecraft.

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stammer
Definition:	To speak with involuntary pauses or repetitions.
Synonyms:	bumble, falter, stutter