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World's Oldest Footprints

World's Oldest Footprints
The oldest evidence of four-legged animals walking on land has been discovered in southeast Poland. Rocks from a disused quarry record the "footprints" of unknown creatures that lived about 397 million years ago.


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Rating: 3.0 / 5 (1002 votes)
Posted by nova on January 26, 2010
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