Cahokia: Ancient America's Great City on the Mississippi

Professor Timothy R. Pauketat illuminates the riveting discovery of the largest pre-Columbian city on U.S. soil. Once a flourishing metropolis of 20,000 people in 1050, Cahokia had rotted away by 1400. Its earthen mounds near modern-day St. Louis reveal 'woodhenges' and evidence of large-scale human sacrifice.