We're counting down the world's top ten alien encounters, from the first reported abduction event to mass UFO sightings over New York's Hudson Valley to an incident in ancient Rome that changed the course of human history. Could these incredible accounts be actual encounters with visitors from the stars?

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Keywords

Alien encounters, Alien theory, Ancient Aliens, rencontres extraterrestres

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• UFO Documentaries / TV Series / Ancient Aliens Season 17 (Vostfr)

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