Billions of dollars have been spent in our quest to find an "other Earth." See more in Season 10, Episode 6, "The Other Earth." 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 at ...

In August of 2014, Russian cosmonauts aboard the International Space Station discovered something incredibly unexpected covering parts of the windows--living sea plankton. See more in Season 10, Episode 7, "Creatures of the Deep." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and ...

Could it really be that these otherworldly visitors coexist among us, crossing over from unseen dimensions into our world? Find out in this video from Season 2, Episode 12, "ALIENS AND THE UNSEEN." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your ...

Over 10,000 crop circles have been reported worldwide, appearing in 50 different countries, and nearly every continent on Earth. See more in Season 10, Episode 8, "Circles from the Sky." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite ...

Are hybrids like the Centaur, the Minotaur and Medusa just mythical creatures of fantasy--or could these ancient depictions of terrifying monsters have been the result of advanced extraterrestrial transplantation procedures? See more in this scene from Season 3, Episode 2, "Aliens and ...

Check out these top secret alien crashes in this compilation from Ancient Aliens. 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 at http://history.com/schedule. #AncientAliens Subscribe for more from ...

On March 19th, 2002, Gary McKinnon was arrested for hacking into 97 Pentagon and NASA computers over a 13-month period, in what authorities call the "biggest military computer hack of all time." See more in Season 10, Episode 9, "The Alien Wars." Watch all new episodes of Ancient Aliens, ...

ANCIENT ALIENS : ORIGIN OF HUMANITY - FULL HD SCIFI MOVIE IN ENGLISH - ORIGINAL V MOVIES Discovering mysterious extraterrestrial beings. More and more evidence and appearances of UFOs surround our Earth. Secrets, cover-ups, discoveries, testimonies suggest a contact, a contact with beings who ...

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 the Hieroglyphics Stairway located in western Honduras chronicles Maya rulers communication with extraterrestrials, in this clip from Season 4, "The Mayan Conspiracy." Watch all new episodes of Ancient Aliens, returning Friday, August 6 at 9/8c, and stay up to ...

If extraterrestrials are watching over humanity, Ancient Astronaut Theorists suggest the next great global catastrophe could be caused by our heavenly ancestors in this clip from Season 9, "The Great Flood". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

Tune in to Alien Invasion Week on History starting Monday 9/30 through Friday 10/4 for new Ancient Aliens, plus the premiere of In Search Of, new UFO Specials and More! Ancient Astronaut Theorists claim that extraterrestrials influenced the outcome of the Civil War and made believers out of ...