A mysterious orb flies alongside a Navy aircraft and abruptly stops. See more in this scene from Season 2, Episode 1, "Unidentified Aerial Phenomena." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for ...

Area 51 has extreme security measures in place. So what lies inside this secretive military base? See more in this scene from Season 2, Episode 2, "Extraterrestrial Informants." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. ...

Did alien knowledge assist humans in making achievements in outer space? See more in this scene from Season 1, Episode 11, "Mission to Outer Space." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more ...

Delve into the astonishing account of a man with an unearthly ear implant 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. #AncientAliens Subscribe for ...

Might this structure belong to an extraterrestrial epoch in Earth's history? Find out in this scene from Season 2, Episode 5, "Aliens and the Buried Past". Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe ...

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 ...

Some of these petroglyphs make experts wonder if they were created because of extraterrestrials. See more in this scene from Season 1, Episode 12, "The Global Connection." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The ...

How did these hieroglyphics end up in Australia? See more in this scene from Season 1, Episode 12, "The Global Connection." 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 ...

Unravel the mystery of crop circles, from time travel to secret messages in this Ancient Aliens compilation. 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. ...

Across the globe, there are remarkable ruins, statues and carvings that appear to connect diverse ancient civilizations to one another. See more in Season 1, Episode 12, "The Global Connection." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your ...

Prepare to uncover the enigmatic secrets of Area 51 through the lens of Ancient Aliens. Delve into the heart of one of the world's most secretive locations as ancient astronaut theorists decode the mysteries surrounding extraterrestrial encounters, top-secret experiments, and otherworldly ...

Governments are openly investigating UFO and extraterrestrial sightings. 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 ...