Watch all new episodes of Ancient Aliens returning soon, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. During the International UFO Congress, attendees shared their alien encounters, leading ancient astronaut theorists to conclude that various races of ETs have been using humans for genetic testing, in this clip from Season 14, "The Reptilian Agenda." #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: https://histv.co/SubscribeToHistory 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...
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