Some believe that Arkaim might have been utilized by extraterrestrial beings when it was constructed in this clip from Season 11, Episode 12, "Russia's Secret Files". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out ...

Some say that ancient coil-shaped artifacts found in Russia’s Ural Mountains may be evidence of a past advanced civilization in this clip from Season 11, Episode 12, "Russia's Secret Files". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

Cosmonauts aboard the Russian space station Salyut 7 report having seen creatures reminiscent of angels in space in the past in this clip from Season 11, Episode 12, "Russia's Secret Files". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

Some say that the Roswell UFO crash is not the only one to have had witnesses in this clip from Season 11, Episode 13, "Beyond Roswell". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch ...

Roswell researchers suggest that the government sanctioned a bond of secrecy, preventing witnesses of the Roswell UFO crash retrieval from coming forward publicly in this clip from Season 11, Episode 13, "Beyond Roswell". #AncientAliens Subscribe for more from Ancient Aliens and other great ...

Some believe that recently discovered new elements and materials are the result of reverse engineering alien technology in this clip from Season 11, Episode 13, "Beyond Roswell". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

People who claim to have been abducted by aliens also say their DNA was manipulated and that human-alien hybrids live among us in this clip from Season 11's episode, "The Returned". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

Some experts believe that biology and technology can be combined to unlock the secrets of immortality in this clip from Season 10's episode, "Aliens and Robots". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more ...

Chemist, Michel de Nostradamus, published an almanac containing verses that predicted the future, but nobody knows the source of these powers of predictions, in this clip from Season 5, "Prophets and Prophecies." Watch all new episodes of Ancient Aliens, returning soon, and stay up to date on ...

Ancient astronaut theorists believe that the approximately 12,000-year-old Gobekli Tepe monument in modern-day Turkey may have been built by the survivors of a lost society in this clip from Seaspn 10, Episode 2, "Aliens B.C". #AncientAliens Subscribe for more from Ancient Aliens and other great ...

Underwater structures in the Bahamas might reveal evidence of a lost extraterrestrial civilization that could be a warning about the future of humanity in this clip from Season 10, Episode 2, "Aliens B.C". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

Verner Von Braun developed NASA technologies that put a man on the moon, but some Ancient Astronaut Theorists suggest he was inspired by something extraterrestrial in this clip from Season 10, Episode 3, "NASA's Secret Agenda". #AncientAliens Subscribe for more from Ancient Aliens and other great ...