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 ...

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: ...