Archaeological discoveries in China dating back 4,000 years have many questioning if humans originated from an outside world in this clip from Season 11, Episode 9, "The Hidden Empire". #AncientAliens Subscribe for more from Ancient Aliens and other great HISTORY shows: ...

An ancient city with advanced architectural features found at the bottom of Fuxian Lake - and that pre-dates the lake itself - has ancient astronaut theorists asking who built this city in this clip from Season 11, Episode 9, "The Hidden Empire". #AncientAliens Subscribe for more from Ancient ...

Ancient astronaut theorists claim that several UFO-related incidents in China over the years have led to the Chinese government's beginning to acknowledge that extraterrestrial life may exist in this clip from Season 11, Episode 9, "The Hidden Empire".#AncientAliens Subscribe for more from ...

Some archeologists claim that a lack of intelligence might not be the reason for Neanderthals' extinction 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 out ...

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: ...