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

On September 12th, 1991, NASA captured strange extraterrestrial activity but has since kept it hidden, in this clip from Season 4, “The Nasa Connection.“ Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: Find out more about the show and watch full episodes on our site: Check out exclusive HISTORY content: History Newsletter - Website - Facebook - Twitter - “Ancient Aliens“ explores the controversial theory that extraterrestrials have visited Earth for millions of years. HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining m