Join us at AlienCon to see your favorite experts from Ancient Aliens!

Ancient astronaut theorists believe that the approximately 12,000yearold Gobekli Tepe monument in modernday Turkey may have been built by the survivors of a lost society in this clip from Season 12, Episode 16, "Return to Gobekli Tepe". #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:
http://po.st/AncientAliens

Check out exclusive HISTORY content:
History Newsletter: http://po.st/HistoryNewsletter
Website http://po.st/HistoryWeb
Facebook http://po.st/HistoryFacebook
Twitter http://po.st/HistoryTwitter

"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

HISTORY®, now reaching more than 98 million homes, is the leading destination for awardwinning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network's alloriginal programming slate features a roster of hit series, epic miniseries, and scripted event programming. Visit us at http://www.HISTORY.com for more info.