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Guess Where the Oldest Rocks in North America Are

  • Aired: 1/16/2013
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Synopsis >

Researchers have finally determined where the oldest rock art in North America is located -- it's on the west side of Nevada's dried-up Winnemucca Lake. There are several limestone boulders with deep, ancient carvings and new research has revealed that they date back to between 10,500 and 14,800 years. Those are some old rocks!

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