Ancient Astronaut Theorists believe strange shadow beings could've been produced from alien technology, in this clip from Season 18, "The Shadow People." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find ...

For the first time in half a century, Congress held a hearing on UFO sightings and even unveiled two never-before-seen videos. Pentagon officials admitted that most of what they call unidentified aerial phenomena remains unexplainable. NBC’s Gadi Schwartz reports for TODAY. » Subscribe to ...

Watch all new episodes of The Proof Is Out There, Tuesdays at 10/9c, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule. Expert UFO investigator, Rich Hoffman, recalls his experience conducting an extensive investigation into a mysterious UFO ...