Are these structures ACTUALLY from out of this world? See more in this compilation from Ancient Aliens. 00:00 - Carnac Stones Baffle Archaeologists 03:45 - Sky God Landing Pad in Baalbek 06:46 - Extraterrestrial Ties to Japan’s Holiest Monument 12:31 - Giant Stone Structure Hides a Secret ...

He didn't tell anyone what he saw for YEARS. See more in this scene from Season 19, Episode 5, "The MUFON Files." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from ...

This mysterious area may be best known for its meteorite activity. See more in this scene from Season 19, Episode 6, "Cosmic Impacts." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...

This mysterious interstellar object has been boggling scientist's minds. See more in this scene from Season 19, Episode 6, "Cosmic Impacts." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...