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Mysteriously Rippled Rock Could Mean Ancient Life [VIDEO]
The ripples on a sandy seafloor are clearly caused by the dependable ebb and flow of our ocean's currents. But what about in prehistoric stone? Miniature versions of these ripples are frequently found in fossils - presented in such a way that is not reminiscent of anything seen today. Now, researchers finally believe they have determined what these wrinkles in rock actually are: the "footprints" of ancient microbial life.
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