Surveillance footage at Skinwalker Ranch catches an inexplicable image: a UFO passing overhead right as bizarre events happen on the ground, in this scene from Season 1, "Surveillance." Watch all new episodes of The Secret of Skinwalker Ranch, Tuesdays at 9/8c, and stay up to date on all of ...

If aliens visited Earth in the remote past, could they have given us advanced technology, passed down through human history? And could this technology have helped the Third Reich build mysterious weapons and crafts far beyond the limits of 20th century science? German aerospace engineer Wernher ...

Could it be that the forces of inspiration that the ancients attributed to the gods really did emanate from an otherworldly source? Is it possible, as Ancient Astronaut theorists believe, of an extraterrestrial connection to the scientific genius of famous historical figures such as Albert ...

Could these sightings, coming from every part of the world, from biblical times to present day, be evidence that aliens have been with us all along? See more in Season 1, Episode 4, "Closer Encounters." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of ...

What if life on Earth began in outer space? See more in this special from Ancient Aliens, Season 1, Episode 99. 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 http://history.com/schedule. ...

Is Hieroglyphics the language of the gods? Or otherworldly beings? See more in this scene from Season 1, Episode 7, "Aliens Codes and Messages." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more ...

Is this rock trying to convey a secret message? See more in Season 1, Episode 7, "Aliens Codes and Messages." 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 ...

Are complex energy waves moving society along by creating visions in our heads?! See more in this scene from 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 ...

Could aliens have influence over every human invention ever? 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 ...

Where did all the people on Easter Island go? See more in Season 1, Episode 10, "Gone Without a Trace." 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 ...

Most people who have been abducted don't remember a thing. See more in this clip from Season 1, Episode 10, Gone Without a Trace. Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient ...

Ancient Astronaut theorists propose these sites are remnants of a lost extraterrestrial electrical system--one erected to draw energy from the Earth. See more in this clip from Season 1, Episode 8, Energy Lines And Hot Spots. Watch your favorite episodes of Ancient Aliens on The HISTORY ...