UFO researcher had to halt his studies after being visited by strange entities, in this clip from Season 18, "The Shadow People." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show ...

An eyewitness in Chile encounters a mysterious UFO during a routine mission, in this clip from Season 15, "Destination Chile." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show and ...

Ancient Astronaut Theorists believe that the colossal tower of Jupiter was erected by ancient sky gods, in this clip from Season 18, "Beneath the Sacred Temples." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

Ancient Astronaut Theorists believe aliens might’ve crashed landed in Russia based on mind boggling evidence, in this clip from Season 15, "The Relics of Roswell." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

Extraterrestrials might’ve been crucial to the construction of Nan Madol, in this clip from Season 18, "Beneath the Sacred Temples." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the ...

Ancient Astronaut Theorists believe that the obelisk of Egypt provides a connection from earth to the heavens, in this clip from Season 17, "Mystery Of the Standing Stones." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

Ancient Astronaut Theorists travel to central New Mexico to examine a UFO crash site related to Roswell, in this clip from Season 15, "The Relics of Roswell." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT ...

Ancient Astronaut Theorists uncover a 54 ton structure on Nan Madol that leads them to more questions, in this clip from Season 15, "The Mystery of Nan Madol." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT ...

Are aliens deceiving humanity or is humanity itself deceived about aliens? Maybe they're not aliens after all? So are aliens deceiving humanity or is humanity itself being deceived about aliens? Or maybe something else is happening? So many lies have been written and revealed about UFOs that if ...

Three declassified videos show a strange object with unusual characteristics, in this clip from Ancient Aliens. #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full ...

There are many who think that we might not be alone in this big universe, and chances are that they’re not wrong. Be you a fervent believer in conspiracy theories or in extraterrestrial green people, you might be surprised at how often weird stuff pop up that support the idea of aliens. From ...

Ancient Astronaut Theorists question who built Nan Madol after an artificial irrigation system is discovered, in this clip from Season 15, "The Mystery of Nan Madol." #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...