Edgar Cayce prophesied that Atlantis once existed and might be connected to the Sphinx. See more in Season 19, Episode 15, "Edgar Cayce: The Sleeping Prophet." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...

The brain is the last untamed beast in the universe. See more in Season 1, Episode 9, "Aliens and the Superhuman Mind." 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 ...

Could this pyramid have been built to greet extraterrestrial visitors? See more in this #Short 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 ...

Do alien hybrids walk among us on Earth? 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 great The HISTORY Channel ...

Were Delphi's powers real? See more in this clip from Season 19, Episode 16, "The Gods of Greece." 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 ...

These underground offices are studying the power coming from a pyramid in Alaska. See more in this #Short 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 ...

What should we make of these international UFO sightings? See more in this compilation from The Proof Is Out There. Watch all new episodes of The Proof Is Out There, Fridays at 10/9c, and stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule. If ...

A policeman witnesses alien activity. See more in this #Short 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 great The HISTORY Channel shows: ...

Many people believe that there are extraterrestrial reptilian humanoids that have been spotted on Earth. See more in this compilation from Ancient Aliens. 00:00 Reptilian-Human Hybrid 03:49 Reptilian Statues 10:23 Patient with Reptilian Heart Watch your favorite episodes of Ancient Aliens on ...

Is an alien assisting the U.S. government? See more in this #Short from Ancient Aliens. #AncientAliens "Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years. HISTORY® is the leading destination for award-winning original series and ...

Are UFOs disappearing inside volcanoes? See more in this #Short from Ancient Aliens. #AncientAliens "Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years. HISTORY® is the leading destination for award-winning original series and ...

Might there be a connection between all these missing person cases--one possibly involving otherworldly portals and even extraterrestrial beings? See more in this scene from Season 1, Episode 10, "Gone Without a Trace." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel ...