HISTORY | Ancient Aliens: Dimming Star Caused by Alien Spacecraft (Season 20) @HISTORY | Uploaded September 2024 | Updated October 2024, 1 week ago.
In the 21st century, the search for extraterrestrial intelligence is ramping up like never before, with powerful new technologies allowing us to explore billions of stars across the universe. See more in this scene from Season 20, Episode 14, "The Search For Extraterrestrial Intelligence."

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

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