Security camera catch an inexplicable UFO on tape, in this scene from Season 4, "The Return." New episodes of The Secret of Skinwalker Ranch, Tuesdays at 10/9c. Stay up to date on all your favorite The HISTORY Channel shows at http://history.com/schedule. Check out more full episodes of The ...

The Phoenix Lights remain one of the most mysterious UFO sightings in history! Was it an extraterrestrial encounter or a massive cover-up? Witness the shocking footage and decide for yourself—was this a true UFO event or just another unexplained phenomenon? #UFO #PhoenixLights #mystery ...

Check out these secret messages and more. See more in this Ancient Aliens marathon. New Season Fri., Feb. 7 at 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 from ...

Get ready for a journey that will leave you speechless! In this mind-blowing video, we've compiled the most astonishing UFO encounters caught on camera. From eerie lights in the sky to bizarre alien sightings, these real-life UFO encounters will make you question everything you thought you knew ...

A Shepard in Turkey makes a remarkable discovery of a strange stone structure engraved with interesting carvings, see more in this clip from Season 21, Episode 1, "The Top Ten Extraordinary Discoveries." New Season Fri., Feb. 7 at 9/8c; Stream Next Day, and stay up to date on all of your ...

ASTOUNDING Viewer Submitted UFO Sightings Uncovered! Get ready to question everything you thought you knew about UFOs! In this thrilling video, we're diving into REAL viewer submitted UFO sightings that will leave you speechless. From mysterious lights in the sky to bizarre alien encounters, ...

Ancient Aliens is counting down the world's top ten most mysterious sites. See more in this marathon from Ancient Aliens. New Season Fri., Feb. 7 at 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. ...

Join us as we dive into the shocking true stories of Navy pilots who have encountered UFOs over the ocean! From unexplained radar contacts to eerie visual sightings, these experienced pilots reveal the astonishing encounters that have left them shaken and searching for answers. With their ...

Researchers do a deep dive analysis on some strange alien theories, see more in this Ancient Aliens marathon. New Season Fri., Feb. 7 at 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 ...

During a congressional hearing regarding Unidentified Aerial Phenomena, the Pentagon released never before seen footage of UFO activity. See more in this clip from Season 3, Episode 11, "Congressional UFOS, New Nessie and Zombie Fish." Watch all your favorite episodes of The Proof Is Out ...

Sightings of UFOs have always been exciting to hear, Pilots around the globe report usual objects in the sky but what is it they see? Some believe they are alien spacecraft, while others believe they are optical illusions.  Whatever it is, these sightings of UFOs remain an intriguing mystery. ...

Check out these strange & unbelievable alien theories, see more in this Ancient Aliens marathon. #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 on our ...