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Check out these shocking human theories. See more in this Ancient Aliens compilation. Ch1 - 0:00 - The Visitors Ch2 - 5:26 - The Time Travelers Ch3 - 8:23 - Race Against Time Ch4 - 15:13 - Humans and Aliens Watch full episodes and stay up to date on all of your favorite shows on The HISTORY Channel website at http://history.com/schedule. # ...
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