Ancient Aliens: OLDEST GLYPHS EVER Found in North America (Special) | History

Transcript

NARRATOR: Western Nevada, 2013. On the west side of the dried-up Winnemucca Lake, researchers take samples from a layer of white carbonate covering petroglyphs carved into limestone boulders. Radiocarbon tests performed by the University of Colorado Boulder reveal that the petroglyphs were etched between 10,500 and 14,800 years ago, making them the... Read More