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UFOs Beneath the Ocean & More Mysteries of the Deep (S19, E19) | Ancient Aliens | Full Episode
We're counting down the top ten mysteries of the deep, from sunken continents to puzzling ruins on the ocean floor and even artifacts that might be remnants of Atlantis. In Season 19, Episode 19, "The Top Ten Mysteries of the Deep." Stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule # ...
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