The Top Ten Alien Petroglyphs (S19, E20) | Ancient Aliens

Ancient Aliens is counting down the top ten alien petroglyphs around the world, from strange, human-like figures to flying craft and carvings of what appear to be astronauts. In Season 19, Episode 20, "The Top Ten Alien Petroglyphs." Find out more about the show and watch full episodes on our site:...

41 min - Space & the Universe - HISTORY

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