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Title: A NASA orbiter has spotted a rolling stone on Mars Written by: duddy on Aug 17, 2014 (https://biology-forums.com/gallery/47/4_17_08_14_3_11_14.png) (https://biology-forums.com/index.php?action=gallery;sa=view;id=18180) A six-metre tall boulder that bounced down a slope on Mars has left a mark visible from space. NASA's Mars Reconnaissance Orbiter took a snapshot of the 500-metre long trail in July. |