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The Mayan civilization dominated Central America for nearly 2000 years, but by the 9th century A.D., the great Mayan cities were abandoned, and the Mayan people vanished. See more in Season 4, Episode 1, "The Mayan Conspiracy." Watch an all new season premiering Friday, August 29th at 9/8c. Watch full episodes and stay up to date on all of your ...
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