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 believe tangible historical accounts could provide proof of alien intervention in man’s evolution ...

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! The Carnac Stone are the largest collection of standing stones in the world, but nobody really knows why they were built in ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Some Ancient Astronaut Theorists believe alien life could be found deep within the earth's most mysterious caves in this clip from Season 9, "Forbidden Caves". #AncientAliens Subscribe for more from Ancient Aliens and other ...