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A United Launch Alliance Atlas V rocket carrying
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A United Launch Alliance Atlas V rocket carrying NASA's Mars Science Laboratory (MSL) Curiosity rover lifts off from Launch Complex 41at Cape Canaveral Air Force Station in Cape Canaveral, Fla. on Saturday. The rocket will deliver a science laboratory to Mars to study potential habitable environments on the planet. (Nov. 26, 2011)(Credit: AP)

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NASA launches Mars Curiosity rover

The world's biggest extraterrestrial explorer, NASA's Curiosity rover, rocketed toward Mars on Saturday on a search for evidence that the red planet might once have been home to itsy-bitsy life.