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What "Ancient Aliens" 3-th episode about
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? The infamous tale of the long lost city of Atlantis may be a preserved memory of an ancient alien metropolis.
Episode number: 3
Episode name: "Underwater Worlds"
Episode release date: 12 november 2010 at 03:00
Status: aired
Rating: 7.6