![Ancient Aliens: The Demise of Neanderthals (Season 11) | History Ancient Aliens: The Demise of Neanderthals (Season 11) | History](https://i.ytimg.com/vi/k6wp9XFrsq4/maxresdefault.jpg)
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 ...
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