Archaeologists believe the sudden destruction of a pre-Columbian civilization found in southern Illinois occurred around 1150 AD. But to find the cause of such upheaval, they look to the surrounding trees.
Five hundred years before Columbus arrived, a metropolis flourished in North America. It was bigger than Paris and London and featured a towering pyramid that still stands today. What happened to this ancient mega-city and why has it remained one of Western archaeology's best-kept secrets? Using modern technology, we explore this lost empire and reveal its shocking past that marked the dramatic rise and fall of America's first great city.
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