Nevada carvings are oldest petroglyphs in North America

August 15, 2013 3:17 PM

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Nevada carvings are oldest petroglyphs in North America

Ancient rock etchings found along a dried-up lake bed in Nevada are the oldest petroglyphs in North America, scientists have said.

The carvings, in the north of the state, are at least 10,000 years old and may be as old as 14,800 years.

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