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View Diary: Mars Once Had Rivers - Ancient Streambed Found by Curiosity Rover (140 comments)

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  •  Not really (6+ / 0-)

    Concrete is basically man-made sedimentary rock from what I understand. If I'm not mistaken it's basically sand, lime and gravel, all of which are to be found in abundance on earth. I'm sure that there are rocks that look like this on earth. It's just weird because it looks man-made, and the breaks look like any old country road that's been poorly maintained. I guess they have budget cutbacks on Mars!

    "Liberty without virtue would be no blessing to us" - Benjamin Rush, 1777

    by kovie on Thu Sep 27, 2012 at 05:27:17 PM PDT

    [ Parent ]

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