There are some who believe that people with Rh-negative blood may have evolved from an extraterrestrial species in this clip from Season 11's episode, "The Prototypes". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find ...

Some believe that the early existence of different kinds of hominids may have an extraterrestrial explanation in this clip from Season 11's episode, "The Prototypes".#AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find ...

Ancient astronaut theory suggests that the moon may be engineered by extraterrestrial beings in this clip from Season 11, Episode 11, "Space Station Moon". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more about ...

There are some who are suspicious about what the Apollo 11 astronauts found on the moon in this clip from Season 11, Episode 11, "Space Station Moon." #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more about the ...

Some say there is evidence that supports the Hollow Moon theory in this clip from Season 11, Episode 11, "Space Station Moon". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full ...

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: ...