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Mars Rolling Rock Ends Up As Standing Stone

An orbiting Mars camera has spotted the aftermath of a fun event on Mars: A boulder that has rolled down a steep slope -- and ended up resting on its long axis as a standing stone. Continue reading →

August 14, 2014
12:29 PM EDT
Trails of Mars rocks that have rolled down the slope of a crater rim as imaged by the HiRISE camera in an earlier observation... and a warning for Mars colonists. | NASA/JPL-Caltech/University of Arizona (edit by Ian O'Neill)

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