Explore the tantalizing theory of extraterrestrial viruses seeding life on Earth in this scene from Season 2, Episode 3, "Interstellar Fallout". Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more ...

Unravel the mysterious crash of an NYPD pilot's encounter with an unidentified flying object in this scene from Season 2, Episode 4, "Extraterrestrial Close Encounters". Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. ...

Learn the secrets and ideas of Da Vinci 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: ...

The theory surrounding Baalbek suggests that the construction of the site might have had assistance or guidance from beings beyond Earth. Find out more in this scene from Season 2, Episode 5, "Aliens and the Buried Past". Watch your favorite episodes of Ancient Aliens on The HISTORY Channel ...

Might an examination of Leonardo Da Vinci's masterful paintings, highly technical hand-drawn sketches, and private journals reveal knowledge of otherworldly technology and extraterrestrial beings? See more in Season 4, Episode 8, "The Da Vinci Conspiracy." Watch your favorite episodes of ...

These ancient "wheels of knowledge" can be found all across the globe. See more in this scene from Season 2, Episode 7, "Alien Outposts." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from ...

Do the mysteries of Easter Island have something to do with extraterrestrial beings? 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 ...

Ancient Aliens is counting down ten of the most intriguing--and mysterious--symbols and codes found across the globe that just might contain proof of otherworldly contact. See more in this scene from Season 20, Episode 5, "The Top Ten Alien Codes." Watch your favorite episodes of Ancient ...

According to Francis Crick, human DNA was far too complex to have evolved over the history of planet earth, which led to theories of extraterrestrial interference with human DNA, in this clip from Season 17, "The Human Experiment." #AncientAliens Subscribe for more from Ancient Aliens and ...

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 ...

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. ...