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 ...

In many cultures, the power of the spoken word can activate energy in a talisman. See more in Season 19, Episode 18, "The Power of the Talisman." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more ...

When will they return? 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 shows: ...

For thousands of years, Scotland has been an epicenter of otherworldly phenomena. See more in Season 20, Episode 9, "Mysteries of Scotland." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from ...

Mysterious places can be found around the Earth, and, inexplicably, UFOs are often sighted near these mystical areas. See more in Season 2, Episode 1, "Mysterious Places." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. ...

Throughout the world there are mysterious ancient stones shaped into perfect spheres. Many of them show clear evidence of being manmade and some completely defy explanation. Could the mystery of the stone spheres provide clues about humankind's alien past? See more in this scene from Season 20, ...

These mysteries will blow your mind. Check them out 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 ...

Throughout the world there are mysterious ancient stones shaped into perfect spheres. Many of them show clear evidence of being manmade and some completely defy explanation. Could the mystery of the stone spheres provide clues about humankind's alien past? See more in Season 20, Episode 10, ...

If extraterrestrials influenced human history, can evidence of their existence be found in hidden tunnels and caverns around the world? See more in Season 2, Episode 4, "Underground Aliens." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at ...

Ancient Astronaut Theorists have found compelling similarities between Mount Shasta and the Great Pyramid that explain the purpose they've served, in this clip from Season 17, "The Mystery of Mount Shasta." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all ...

Could the pyramids around the globe be somehow interconnected? See more in this scene from Season 2, Episode 11, "Extraterrestrial Pyramids." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at ...