Ancient underwater cities can be found around the globe, but could these aquatic worlds be the ruins of unknown civilizations–or even proof of extraterrestrial visitations? See more in Season 2, Episode 4, “Aliens Above and Below.”
Stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule.
#AncientAliens
Subscribe for more from Ancient Aliens and other great The HISTORY Channel shows:
http://histv.co/SubscribeHistoryYT
Find out more about the show and watch full episodes on our site:
https://histv.co/AncientAliens
Check out exclusive The HISTORY Channel content:
History Newsletter – https://histv.co/newsletter
Website – https://histv.co/History
Facebook – https://histv.co/Facebook
Twitter – https://histv.co/Twitter
“Ancient Aliens” explores the controversial theory that extraterrestrials have visited Earth for millions of years.
The HISTORY Channel® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.
Source
