HISTORY | Ancient Aliens: Steven Spielberg's Probing Investigation of UFOs (S20) @HISTORY | Uploaded September 2024 | Updated October 2024, 1 week ago.
Will Dr. Vallee's incredible work soon lead to answers about what has been happening in our skies for thousands of years? See more in this scene from Season 20, Episode 15, "Jacques Valle: UFO Pioneer."

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

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