All New Season, Friday December 21 at 9E/10P Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full episodes on our site: http://po.st/AncientAliens Check out exclusive HISTORY content: History ...

Ancient Astronaut theorists believe that ancient man may have had extra-terrestrial help to build colossal structures like Stonehenge. Subscribe for more from Ancient Aliens and other great HISTORY shows: http://histv.co/SubscribeHistoryYT Find out more about the show and watch full episodes on ...

Could a mysterious portal carved into a cliff near Peru's Lake Titicaca be an ancient stargate? #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 episodes on our site: ...