Ancient Aliens: NASA’s Untold Extraterrestrial Encounter (Season 4) | History

On September 12th, 1991, NASA captured strange extraterrestrial activity but has since kept it hidden, in this clip from Season 4, "The Nasa Connection."

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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: NASA’s Untold Extraterrestrial Encounter (Season 4) | History
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