Ancient Aliens: Project Blue Book Proves UFO Phenomenon (Season 16) | History
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Dr. J. Allen Hynek pioneered new ways of studying aerial phenomenons and later developed a UFO classification system modeled by others, in this clip from Season 16, “The UFO Pioneers.” #AncientAliens
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“Ancient Aliens” explores the controversial theory that extraterrestrials have visited Earth for millions of years.
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