Ancient Aliens: ALIEN CIVILIZATIONS ON THE OCEAN FLOOR (Season 14) | History

Watch all new episodes of Ancient Aliens returning Saturdays at 9/8c, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. A super-suit designed to allow humans to breath liquid air might be the key to exploring undiscovered parts of our sea, according to ancient theorists. But lurking beneath the waves, could there be highly advanced alien civilizations? Find out more in this clip from Season 14, "They Came from the Sea". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full episodes on our site: https://histv.co/AncientAliens Check out exclusive HISTORY content: History Newsletter: https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Twitter - https://histv.co/Twitter HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.