Across the globe, monumental stone figures silently bear witness to a forgotten era. See more in this scene from Season 2, Episode 10, "Alien Effigies." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for ...

More than 7,000 years ago, the ancient Sumerians established what is considered the world's first civilization, and they credited their extraordinary achievements to their gods, the Anunnaki. See more in this scene from Season 20, Episode 7, "Secrets of the Sumerians." Watch your favorite ...

Ancient Aliens is counting down the top ten most devastating disasters ever documented that might have an otherworldly connection. See more in this scene from Season 20, Episode 6, "The Top Ten Alien Disasters." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at ...

More than 7,000 years ago, the ancient Sumerians established what is considered the world's first civilization, and they credited their extraordinary achievements to their gods, the Anunnaki. See more in this scene from Season 20, Episode 7, "Secrets of the Sumerians." Watch your favorite ...

Massive object travels at 500 MPH! See more in this scene from Season 20, Episode 8, "The UFO Superhighway." 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 ...

Did people in the past see these rulers as gods, or could they actually be linked to aliens? Come along on a journey through history as we dig into stories that mix the ideas of divinity and extraterrestrial origins. Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website ...

Along the Earth's north 37th parallel there have been so many reports of unidentified flying objects, animal mutilations, and other mysterious events that it has been dubbed The UFO Superhighway. Learn more in this scene from Season 20, Episode 8, "THE UFO SUPERHIGHWAY." Watch your favorite ...

Could it be that Scotland is a magnet for extraterrestrial visitors? Find out in this clip from 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 ...

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, ...