Wheels were first attached to NASA's Mars Science Laboratory rover in August 2008. The rover and its descent stage and cruise stage are being assembled and tested at NASA's Jet Propulsion Laboratory, Pasadena, Calif., for launch in 2009.
The rover has a ground clearance of about 60 centimeters, or 2 feet. The wheel base is 2.2 meters, or 7 feet.
Image Credit: NASA/JPL-Caltech
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