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 ...

There is a stone platform underneath ancient Greek and Roman ruins that ancient astronaut theorists believe was used as a platform to launch extraterrestrial aircraft in this clip from Season 8, "Mysterious Structures". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Investigate the mysterious tomb known as KV55 - and how the Egyptians tried to erase its occupant from history in this digital exclusive from Ancient Aliens, Season 12. #AncientAliens Subscribe for more from Ancient Aliens ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Could the mythical horns that brought down the walls of Jericho actually have been alien technology? Ancient Astronaut Theorists say "yes" in this clip from Season 8, "Mysterious Devices". #AncientAliens Subscribe for more ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Discover how King Tut's dagger was made from meteoric iron, a 'gift from the gods,' in this digital exclusive from Season 12. #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Ancient astronaut theorists believe the Greek mythological story of Poseidon was really a metaphor for an extraterrestrial event where mutinous aliens were expelled from the mothership in this clip from Season 8, "Faces of ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Stories about supernatural beings known as Jinn, or genie, in Islamic folklore are linked to an ancient astronaut theory about ultra-terrestrials that walk among us undetected in this clip from Season 8, Episode 4, "Faces ...

The search continues with new episodes of In Search Of Fridays at 10/9c! A compelling thought experiment proposes that dinosaurs could have evolved into humanoid beings and continue to roam the earth today in this clip from Season 8, "The Reptilians". #AncientAliens Subscribe for more from ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Ancient texts known as the Nag Hammadi codices describe reptilian entities interacting with humans and ancient astronaut theorists believe these represent real Reptilian beings from the ancient past in this clip from Season ...

The search continues with new episodes of In Search Of Fridays at 10/9c! While often considered to be at odds with one another, science and religion have a shared goal that could be mutually achieved in this clip from Season 8, "The God Particle". #AncientAliens Subscribe for more from Ancient ...

The search continues with new episodes of In Search Of Fridays at 10/9c! The discovery of the Higgs Boson, or god particle, was a milestone in human knowledge that opened up new realities about the nature of our universe in this clip from Season 8, "The God Particle". #AncientAliens Subscribe ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Recent military technology mirrors Tesla's concept of a death ray. Ancient Astronaut Theorists believe this could be proof that Tesla was capable of seeing into the future, in this scene from Season 8, "The Tesla ...