Road Trip
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Mars Exploration Rovers on the Move in 2006
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microscopic view from Spirit of rock Hardened Lava
Spirit used its microscopic imager to capture this jagged mini-landscape on a rock called "GongGong." In this image measuring only 3 centimeters (1.2 inches across), the rock surface records two of the major geologic forces on Mars -- volcanoes and wind.

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  Jet Propulsion Laboratory
   California Institute of Technology