History Channel Documentary UFO Sightings alien civilizations Alien Documentary 2015 HD

1 min

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Take a look at the most fascinating conspiracies from Season 8, including communication via crop circle and the Hollow Earth, in this web exclusive. Subscribe for more from Ancient Aliens.

Was earth visited in the past by Ancient Aliens flying UFOs around and telling there where to build their cities..perhaps hoping that one day in the future we would put together the clues?.

Is it possible that the moon is actually a giant spacecraft allowing extraterrestrials to monitor planet earth? Learn more about this theory in this collection of scenes from Space Station.

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