Learn the secrets and ideas of Da Vinci in this compilation from Ancient Aliens. Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows: ...

For many years now we all have been asking if we are alone in the vast universe spawning various conspiracies and speculations. In today's video we will take a look at the newest UFO, UAP and Alien footage we came across. It proves once and for all we are not alone. The question that now ...