Ancient Astronaut Theorists believe that the colossal tower of Jupiter was erected by ancient sky gods, in this clip from Season 18, "Beneath the Sacred Temples." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

Ancient Astronaut Theorists believe aliens might’ve crashed landed in Russia based on mind boggling evidence, in this clip from Season 15, "The Relics of Roswell." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

Extraterrestrials might’ve been crucial to the construction of Nan Madol, in this clip from Season 18, "Beneath the Sacred Temples." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the ...

An eyewitness spots something strange in Lake Michigan, in this clip from The Proof Is Out There. #TheProofIsOutThere Subscribe for more from The Proof Is Out There and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Watch more The Proof Is Out There on YouTube in ...

Ancient Astronaut Theorists believe that the obelisk of Egypt provides a connection from earth to the heavens, in this clip from Season 17, "Mystery Of the Standing Stones." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

Ancient Astronaut Theorists travel to central New Mexico to examine a UFO crash site related to Roswell, in this clip from Season 15, "The Relics of Roswell." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT ...

The team finds out new information regarding a secret portal located on the ranch, in this clip from Season 3, "Digging Up the Past." #TheSecretofSkinwalkerRanch Subscribe for more from The Secret of Skinwalker Ranch and other great The HISTORY Channel shows: ...

Three declassified videos show a strange object with unusual characteristics, in this clip from Ancient Aliens. #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full ...

More questions arise as the team calls in the astronomical society to conduct another rocket launch experiment, in this clip from Season 3, "Scoped Out." #TheSecretofSkinwalkerRanch Subscribe for more from The Secret of Skinwalker Ranch and other great The HISTORY Channel shows: ...

Ancient Astronaut Theorists question who built Nan Madol after an artificial irrigation system is discovered, in this clip from Season 15, "The Mystery of Nan Madol." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

NASA releases a picture of the moon's craters that many believe to be created by an ancient interstellar civilization, in this clip from Season 1, "Ancient Sounds and Moon Mounds." #TheProofIsOutThere Subscribe for more from The Proof Is Out There and other great The HISTORY Channel shows: ...

Ancient Astronaut Theorists believe that the Bermuda Triangle may have been responsible for multiple mysterious disappearances, in this clip from Season 18, "The Time Benders." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite The HISTORY ...