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Thursday, January 19, 2017

A grid of small polygons on the Martian rock surface near the...



A grid of small polygons on the Martian rock surface near the right edge of this view may have originated as cracks in drying mud more than 3 billion years ago. [4377 x 2163] via /r/spaceporn http://ift.tt/2iNEZ9a



via Tumblr http://ift.tt/2jCMvYx

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