By Jamie Condliffe

This oddly circular outcrop has been discovered on Mars. Scientists don’t know exactly what the 1.2 mile-wide feature is—though it appears to be surrounded by mass of smooth, solidified lava flows.

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Source:: http://feeds.gawker.com/~r/gizmodo/full/~3/dN5VYpGJlGk/what-is-this-strangely-circular-outcrop-on-mars-1666617483