Ancient astronaut theorists believe that there could be an interdimensional portal located on Skinwalker Ranch. See more in this clip from Season 15, Episode 10, "The Mystery of Skinwalker Ranch." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel ...

Was Egypt home to Earth's earliest extraterrestrial visitors? See more in Season 1, Episode 37, "Earth Station Egypt." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from ...

Check out these secret messages in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel ...

Check out these interesting theories surrounding the afterlife. See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient ...

Check out these shocking mysteries! See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other great The ...

The U.S. military has long denied that the infamous 1947 Roswell crash was anything other than a weather balloon, but FBI files released in 2011 include a memo to J. Edgar Hoover regarding the recovery of not one, but three "flying saucers." See more in Season 11, Episode 15, "Shiva the ...

Check out these Native American traditions. See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other ...

Ancient astronaut theorists analyze high speed disc shaped crafts. See more in this clip from Season 15, Episode 11, "The Ultimate Guide to UFOs." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

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🛸 In 1994, over 60 schoolchildren in Zimbabwe claimed they saw a UFO land near their playground. This chilling event—now known as the Ariel School UFO Incident—included eyewitness accounts of strange beings and even telepathic warnings. Were they telling the truth? Could this be real evidence ...

Check out these secrets that are hidden within giant stone structures. See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from ...

Check out these biggest mysteries of Antartica. See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other ...