Do alien portals exist? See more in this compilation from Ancient Aliens. Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. #AncientAliens Subscribe for more from Ancient ...

There's a secret alien portal hidden in the Grand Canyon?? Join us, and find out more! Subscribe for more ► https://wmojo.com/unveiled-subscribe In this video, Unveiled takes a closer look at the bizarre theory that there's a secret alien portal hidden in the heart of one of America's ...