Ancient Aliens: Secret Alien Messages at an Arizona Ranch (Season 18) | History

Ancient Astronaut Theorists come face to face with extraterrestrial writings at Rock Art Ranch, in this clip from Season 18, "Secrets of the Star Ancestors."

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"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

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Ancient Aliens: Secret Alien Messages at an Arizona Ranch (Season 18) | History
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