Have extraterrestrial beings shaped our history? Discover the truth in this marathon from Ancient Aliens. #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full episodes ...

This mysterious mountain in central Sri Lanka is known as a UFO hotspot for various reasons. See more in this clip from Season 21, Episode 6, "The Top Ten Mysterious Mountains." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

Check out these mysterious messages hidden in the sky. See more in this Ancient Aliens marathon. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and ...

Ancient astronaut theorists believe that the Sumerian people of Iraq were visited by an alien race depicted in clay tablets. See more in this clip from Season 1, Episode 4, "Human Genesis." New Season Fri., Feb. 7 at 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on ...

Check out these unusual part human/part alien species. See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and ...

Due to warfare, instability, and inaccessibility--there are specific regions of the world that are off-limits to exploration. See more in Season 10, Episode 10, "The Forbidden Zones." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

These weird sounds will leave you speechless! See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other ...

Looking for evidence of extraterrestrial life? Check out the McPherson Tape, a real-life found footage of a family encountering aliens outside their home. Watch as they film a strange spacecraft with beings and barricade themselves inside, only to capture an alien body and then mysteriously ...

Check out these time travel secrets. See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other great The ...

Check out these alien theories with bible ties. See more in this Ancient Aliens compilation. Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other ...

A paleoanthropologist in South Africa discovers the remains of fossilized skeletal humans. See more in this clip from Season 1, Episode 4, "Human Genesis." Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

Stories of civilizations large and small disappearing without a trace can be found throughout history and across the globe. From a previously unknown civilization in China, a vanished race of giants, to the unexplained disappearances of the Classic Maya and the Anasazi. See more in Season 9, ...