Former police detective Dave Paulides investigates a mysterious disappearance at Mount Shasta, in this clip from Season 17, "The Mystery of Mount Shasta." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website ...

Ancient Astronaut Theorists believe that the obelisk of Egypt was constructed to provide a profound connection to the gods, in this clip from Season 17, "Mystery Of the Standing Stones." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite The ...

A former Pentagon employee shares three groundbreaking declassified videos showing and a strange object with unusual flight characteristics, in this clip from Season 17, "The Disclosure Event." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your ...

Ancient Astronaut Theorists have found compelling similarities between Mount Shasta and the Great Pyramid that explain the purpose they’ve served, in this clip from Season 17, "The Mystery of Mount Shasta." #AncientAliens Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to ...