NASA launching `dream machine’ to explore Mars (AP)

In this 2011 artist's rendering provided by NASA/JPL-Caltech, the Mars Science Laboratory Curiosity rover examines a rock on Mars with a set of tools at the end of its arm, which extends about 2 meters (7 feet). The mobile robot is designed to investigate Mars' past or present ability to sustain microbial life. (AP Photo/NASA/JPL-Caltech)AP - As big as a car and as well-equipped as a laboratory, NASA’s newest Mars rover blows away its predecessors in size and skill.

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