Ancient Aliens S19E20 · The Top Ten Alien Petroglyphs

Ancient Aliens

Season 19 · Episode 20 · The Top Ten Alien Petroglyphs · 41 min

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. Could these mysterious carvings provide a record of extraterrestrial visitation?