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 ...

Throughout history, incredible stories have been told of the dead rising from their graves, mummies journeying into the afterlife, and people on the brink of death mingling with deceased relatives in a celestial netherworld. See more in Season 9, Episode 6, "Alien Resurrections." Watch all ...

Prepare to embark on episode 1 of a mind-bending journey as we delve into the intriguing world of extraterrestrials that share our milky way galaxy in this beginners overview episode. Over the past 50 years, an array of astonishing revelations has emerged, shedding light on various alien ...

Check out these alien connections in India! See more in this Ancient Aliens compilation. Watch all new episodes Fridays 9/8c; Stream Next Day, 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 ...

These eyewitnesses believe they've seen something out of this world. See more in this The Proof Is Out There compilation. Watch full episodes of The Proof Is Out There, and stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule. If you are ...

For thousands of years, in cultures throughout the world, people have practiced elaborate techniques to preserve the human body after death. See more in Season 9, Episode 5, "Secrets of the Mummies." Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your ...

Researchers find mysterious aztec codices in Mexico City. See more in this clip from Season 21, Episode 7, "Mysteries of the Aztecs." Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

Follow David Childress as he investigates mysteries around the world. See more in this Ancient Aliens compilation. Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. ...

These unexplainable theories surrounding children and aliens are finally disclosed. See more in this Ancient Aliens compilation. Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at ...

Check out these unexplainable alien connections. See more in this Ancient Aliens compilation. Watch all new episodes Fridays 9/8c; Stream Next Day, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for ...

Check out these out of this world alien theories. See more in this Ancient Aliens marathon. Watch all new episodes Fridays 9/8c; Stream Next Day, 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 ...

Check out these life altering alien crashes. See more in this Ancient Aliens compilation. Watch all new episodes Fridays 9/8c; Stream Next Day, 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 ...