NASA's next Mars rover, Curiosity, stretches its robotic arm upward during Sept. 3, 2010, tests on a tilt table in a clean room at NASA's Jet Propulsion Labotatory, Pasadena, Calif. Test operators in clean room garb monitor the motions simulating maneuvers that the rover might make while on a sloped surface on Mars.
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Credit: NASA/JPL-Caltech