NASA's Mars Exploration Spirit examined a rock dubbed "Uchben" in the "Columbia Hills" inside Gusev Crater. Spirit took this image with its panoramic camera as it approached the rock during the rover's 278th martian day (Oct. 14, 2004). The visible portion of Uchben is about 50 centimenters (20 inches) long.
Image Credit: NASA/JPL/Cornell
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