An investigation is opened when a pilot claims to have seen a gigantic spaceship while on a flight. See more in this scene from Season 2, Episode 1, "Unidentified Aerial Phenomena." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. ...

Witness the top 5 most compelling UFO sightings connected to the enigmatic Skinwalker Ranch in this exclusive recap. New episodes of The Secret of Skinwalker Ranch coming soon. Stay up to date on all your favorite The HISTORY Channel shows at http://history.com/schedule. Check out more full ...

Area 51 has extreme security measures in place. So what lies inside this secretive military base? See more in this scene from Season 2, Episode 2, "Extraterrestrial Informants." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. ...

Do these pieces of evidence point to otherworldly connections to mankind? See more in this compilation from Ancient Aliens. Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and ...

The largely unexplored continent of Antarctica has long been subject to rumors of UFOs, underground tunnel networks, and concealed ancient structures, giving rise to speculation about an alien presence beneath its icy surface. Learn more in this clip from Season 2, Episode 6, MYSTERIES BENEATH ...

Did alien knowledge assist humans in making achievements in outer space? See more in this scene from Season 1, Episode 11, "Mission to Outer Space." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more ...

Does this evidence confirm the existence of a lost civilization? See more in this compilation from Ancient Aliens. Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other ...

Is NASA trying to silence their Apollo 17 astronauts? See more in this scene from Season 1, Episode 11, "Mission to Outer Space." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient ...

Check out our favorite moments from Ancient Aliens in this 2023 compilation! Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

Is it possible for there to be man-made obelisks on the moon? See more in Season 1, Episode 11, "Mission to Outer Space." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and ...

Opening portals to another world. See more in this #Short from Ancient Aliens. Subscribe for more HISTORY: http://histv.co/SubscribeHistoryYT Check out exclusive HISTORY content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - ...

Could viruses from outer space have played a part in human evolution? Find out more in this scene from Season 2, Episode 3, "INTERSTELLAR FALLOUT". Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more ...