While in restricted waters, eyewitnesses spot an unidentified object performing unusual maneuvers, unlike any other military aircraft, in this clip from Season 18, "Alien Air Force." Watch all new episodes of Ancient Aliens, Fridays at 8/7c, and next day on The HISTORY Channel website at ...

After ruling out several ideas, these mysterious lights above Norway have investigators stumped, in this scene from Season 3, Episode 1, of The Proof Is Out There. #TheProofIsOutThere Subscribe for more from The Proof Is Out There and other great The HISTORY Channel shows: ...

The walls within the Temple of Hathor, depict pharaohs traveling through the stars on a magic bubble. Ancient Astronaut Theorists believe this could mean space travel, in this clip from Season 18, "Alien Air Force." Watch all new episodes of Ancient Aliens, Fridays at 8/7c, and next day on The ...

An eyewitness in Portsmouth, England finds a strange potato-like creature crawling around, 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 ...

Ancient Astronaut Theorists come face to face with extraterrestrial writings at Rock Art Ranch, in this clip from Season 18, "Secrets of the Star Ancestors." Watch all new episodes of Ancient Aliens, Fridays at 8/7c, and next day on The HISTORY Channel website at http://history.com/schedule. ...

A man stumbles upon a strange creature in the forest, 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 Subscribe ...

During a major excavation, the Knight Templar uncover a secret chamber, in this clip from Ancient Aliens. 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 ...

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 ...