Free Spirit: Rock Under the Belly

Engineers placed a rock underneath the test rover at NASA's Jet Propulsion Laboratory, Pasadena, Calif., on July 1, 2009, to more closely simulate Spirit's predicament on Mars.

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<p><a href="http://www.physorg.com/news165768550.html">Free Spirit: Rock Under the Belly</a></p> <p>Engineers placed a rock underneath the test rover at NASA's Jet Propulsion Laboratory, Pasadena, Calif., on July 1, 2009, to more closely simulate Spirit's predicament on Mars.</p>