the u.s. space agency is preparing for its newest mars rover, curiosity, to touch down on the red planet on august 6. the rover's entry and descent will be nerve-wracking for nasa engineers, compounded by a 14-minute delay as the rover's signals travel to earth from mars. if successful, curiosity will be the sixth nasa spacecraft to land on the red planet.
curiosity is the centerpiece of the $2.5 billion mars science laboratory spacecraft, launched in november aboard an atlas v r
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