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Associated Press
Lockeed Martin research scientist Maya Cooper, left, and  Monica Leong, right, prepare a vegan pizza at NASA's Advanced Food Technology Project at Johnson Space Center Tuesday, July 3, 2012, in Houston. NASA is currently planning a mission to Mars, which has gravity, so more options for food preparation, like chopping vegetables, are available as opposed to the dehydrated fare of current space missons. (AP Photo/Michael Stravato)

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