Strange marks on the ground taken on the surface of Mars by Curiosity.
The photo here is we arrested. References are MASTCAM RIGHT FLOOR 90. Photo taken Nov. 6, 2012, and posted on the site on 21 November 2012: I circled in red and well signposted these curious marks geometric.
See the series of photos posted on the official website here ... :
And there is this: in the same place, but photo taken from a different angle:
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