65 million years ago, a giant asteroid caused dinosaurs to go extinct, and this extinction strangely correlates to the Mayans, in this clip from Season 4, "Aliens and Dinosaurs". Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY ...

A theoretical physicist at the University of Connecticut shares his prototype for a large time machine that extraterrestrials could’ve also used, in this clip from Season 4, "The Time Travelers." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your ...

Sacred tales of the ancient world may provide new clues to the oldest records of time travel ever experienced, in this clip from Season 4, "The Time Travelers." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at ...

Could Leonardo da Vinci’s mysterious disappearance be evidence of an alien encounter? Uncover more in this clip from Season 4, "The Da Vinci Conspiracy." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at ...

Ancient astronaut theorists believe that extraterrestrial interference might have impacted the way humans evolved, in this clip from Season 4, "Aliens and Bigfoot." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows ...

According to ancient Mesopotamia texts, the Epic of Gilgamesh tells the tale of a giant creature of extraterrestrial origins, in this clip from Season 4, "Aliens and Bigfoot." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY ...

On September 12th, 1991, NASA captured strange extraterrestrial activity but has since kept it hidden, in this clip from Season 4, "The Nasa Connection." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on all of your favorite The HISTORY Channel shows at ...

Ancient astronaut theories believe that the tsunami of Crete in 365 AD could’ve been caused by an ancient god known as Poseidon, in this clip from Season 4, "Aliens and Mega-Disasters." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite The ...

According to Francis Crick, human DNA was far too complex to have evolved over the history of planet earth, which led to theories of extraterrestrial interference with human DNA, in this clip from Season 17, "The Human Experiment." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and ...

Ancient Astronaut Theorists believe information in the bible reveals that extraterrestrials manipulated human DNA, in this clip from Season 17, "The Human Experiment." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite The HISTORY Channel ...

Former police detective Dave Paulides investigates a mysterious disappearance at Mount Shasta, 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 date on all of your favorite The HISTORY Channel ...

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 ...