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Extras

Episode 3 Preview | Cities of the Sky
Discover the cosmological secrets behind America’s ancient cities.
Episode 3 Preview | Cities of the Sky

Cahokia’s Celestial Calendar (Woodhenge)
An archaeology team work to uncover remains of a celestial calendar at Cahokia.
Cahokia’s Celestial Calendar (Woodhenge)

Extended Interview: Ian Thompson on Ancient Earthen Mounds
The Choctaw scholar reflects on the ancient tradition of earthen mounds and mound culture.
Extended Interview: Ian Thompson on Ancient Earthen Mounds

Extended Interview: Ian Thompson on the Trail of Tears
The Choctaw scholar reflects on the bitter chapter of history known as the Trail of Tears.
Extended Interview: Ian Thompson on the Trail of Tears

Extended Interview: Religion at Teotihuacan
Harvard professor of Religion David Carrasco speaks on religion and Teotihuacan.
Extended Interview: Religion at Teotihuacan
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