Ancient Astronaut Theorists believe that Pharaoh Seti’s lost temple actually served as a Stargate to travel from portal to portal. See more in this clip from Season 18, "Return of the Egyptian Gods." Watch all new episodes of Ancient Aliens, Fridays at 8/7c, and next day on The HISTORY Channel ...

A camera catches a strange humid figure peaking into a bedroom, in this The Proof Is Out There clip. Watch all new episodes of The Proof Is Out There, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule. #TheProofIsOutThere ...

Ancient Astronaut Theorists believe that the long lost Ark of the Covenant contained extraterrestrial powers much too powerful for mankind, in this clip from Season 18, "Recovering the Ark of the Covenant." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and next day on The HISTORY ...

During an Arctic expedition, naval officer Richard Burn makes a very unusual discovery, in this clip from Season 18, "Secrets of Inner Earth." 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 ...

Ancient Astronaut Theorists believe that The Great Flood happened across the world and was genetically engineered by aliens, in this clip from Season 18, "Journey to Immortality." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and next day on The HISTORY Channel website at ...

Cameras catch a strange Unidentified Ariel Vehicle (UAV) flying above the California skies, in this Ancient Aliens clip. 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 ...

A museum in England is home to an ancient Sumerian text that reveals unbelievable secrets, in this clip from Season 18, "Journey to Immortality." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and next day on The HISTORY Channel website at http://history.com/schedule. ...

In Kent, England researchers uncover evidence of the Druid people, in this clip from Season 18, "The Shining Ones." Watch all new episodes of Ancient Aliens, Fridays at 8/7c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from ...

Strange shadow people terrorize humans, in this clip from “The Proof Is Out There.” Watch all new episodes of Ancient Aliens, Fridays at 8/7c, and next day on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other great The ...

Ancient Astronaut Theorists believe that Prince William might’ve investigated and researched a classified UFO phenomenon, in this clip from Season 18, "The World on Alert." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and next day on The HISTORY Channel website at ...

The threat of a possible alien invasion grows, in this clip from Season 1, "Doomsday: 10 Ways the World Will End." #CountdowntoArmageddon Subscribe for more HISTORY: http://histv.co/SubscribeHistoryYT Check out exclusive HISTORY content: History Newsletter - https://histv.co/newsletter ...

Check out these extra strange alien encounters that will leave you shocked. See more in this The Proof Is Out There compilation. Watch all new episodes of The Proof Is Out There, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at ...