He didn't tell anyone what he saw for YEARS. See more in this scene from Season 19, Episode 5, "The MUFON Files." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from ...

These Ancient Egyptian mysteries will have you scratching your head... See more in this compilation from Ancient Aliens. 00:00 Giza Plateau 04:19 Burial Sites 08:43 The Nile Delta 12:40 Abydos Egypt Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY ...

This mysterious area may be best known for its meteorite activity. See more in this scene from Season 19, Episode 6, "Cosmic Impacts." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...

Check out these 4 mysterious alien hieroglyphs, in this compilation from Ancient Aliens. 00:00 Edfu, Egypt 04:10 Copan, Honduras 09:00 Val Camonica, Italy 15:06 Central Coast, Australia Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at ...

This mysterious interstellar object has been boggling scientist's minds. See more in this scene from Season 19, Episode 6, "Cosmic Impacts." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens ...

Rumor has it there's been an alien employed at Area 51. See more in this scene from Season 19, Episode 7, "Close Encounters of the Fifth Kind." Watch all new episodes of Ancient Aliens, Fridays, at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. ...

These three alien encounters changed history as we know it. See more in this compilation from Ancient Aliens. 0:00 -- chapter 1 (Da Vinci's Alien Encounter) 5:39 -- chapter 2 (1812 UFO Encounter Changes History) 9:50 -- chapter 3 (Most Famous UFO Sighting in England) Watch your favorite ...

These 4 clips reveal there may be a connection to aliens and religious texts. See more in this compilation from Ancient Aliens. 00:00 - Otherworldly Ancestors Discovered in Religious Texts 03:00 - Connection Discovered to Religious Rituals 05:38 - Divine Jerusalem Relics Harness Alien Powers ...

Declassified videos are leaked from the Pentagon that appear to show UFOs. See more in this #Short 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 ...

Computer hacker uncovers proof that the U.S. government is working with extraterrestrial beings. See more in this scene from Season 19, Episode 7, "Close Encounters of the Fifth Kind." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. ...

These giant creatures could have been walking among us. See more in this Ancient Aliens compilation. 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 ...

The vast Alaskan wilderness is well known for mysterious disappearances, electromagnetic anomalies, stories of strange creatures, and is a hotspot for UFO sightings. Could Alaska's many mysteries be due to a presence that is not of this world? Find out in this clip from Season 19, Episode 8, ...