Did aliens build these mega structures? | Ancient Aliens: Declassified (S1, E39)

Antarctica is Earth's most remote and least explored continent. See more in Season 1, Episode 39, "Pyramids, Monoliths and Unexplained Structures." Find out more about the show and watch full episodes on our site: "Ancient Aliens" explores the controversial theory that extraterrestrials have...

165 min - Space & the Universe - HISTORY

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