Computer hacker, Gary McKinnon, claims to have uncovered undeniable proof of the Majestic Twelve's existence in this clip from Season 12, Episode 9, "The Majestic Twelve". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find ...

While "the cloud" is a seemingly recent development, ancient astronaut theorists point out that this idea of an other-worldly repository of cosmic information first appeared in ancient Hindu scriptures in this clip from Season 12, Episode 10, "The Akashic Record". Subscribe for more from Ancient ...

Baba Vanga, a blind and uneducated peasant in Bulgaria, was somehow able to predict many world events. Ancient astronaut theorists say invisible extraterrestrials supplied her with information in this clip from Season 12, Episode 10, "The Akashic Record". #AncientAliens Subscribe for more from ...

Ancient astronaut theorists believe that, throughout history, inventions created simultaneously in places far away from one another came to be so because of extraterrestrials introducing information into a universal information field in this clip from Season 12, Episode 10, "The Akashic Record". ...

Join us at AlienCon to see your favorite experts from Ancient Aliens! The idea of transhumans, or artificially enhanced humans, is shown to have been around for a very long time in this clip from Season 11, Episode 3, "The Next Humans". #AncientAliens Subscribe for more from Ancient Aliens and ...

Stay up to date on all of HISTORY's latest premieres at http://history.com/schedule On Junuary 8, 2008, hundreds of residents claimed to have seen UFOs in the sky over Stephenville, Texas in this clip from Season 2, "UFOs". #InSearchOf Subscribe for more HISTORY: ...

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! Massive obelisks filled with quartz were erected across the ancient world. Ancient Astronaut Theorists suggest that these ...

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! There are geoglyphs around the world that Ancient Astronaut Theorists believe could have encoded alien messages in this clip ...

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! There is a mountain in western Tibet that Ancient Astronaut Theorists believe could be a nuclear power plant used by aliens as ...

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! There are quartz obelisks in Egypt that some Ancient Astronaut Theorists believe were used to transmit energy over vast ...

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! Bolivia's stone blocks are so precise that Ancient Astronaut Theorists believe they could not have been built without advanced ...

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! Giorgio talks with an engineer who built a prototype to back up his theory that Puma Punku's stone blocks were actually part of ...