Las Vegas Sun

July 25, 2014

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The ancient carvings on these limestone boulders in northern Nevada's high desert near Pyramid Lake about 35 miles northeast of Reno have been confirmed to be the oldest recorded petroglyphs in North America, at least 10,500 years old.

Larry Benson, USGS / AP

The ancient carvings on these limestone boulders in northern Nevada's high desert near Pyramid Lake about 35 miles northeast of Reno have been confirmed to be the oldest recorded petroglyphs in North America, at least 10,500 years old.