A new study suggests that corn was the staple subsistence crop that allowed the pre-Columbian city of Cahokia to rise to prominence and flourish for nearly 300 years.
Cahokia was the largest urban settlement to develop from the Mississippian culture, a mound-building pre-Columbian civilisation that developed in the Midwestern, Eastern, and South-eastern United States.
With a population between 10,000 and 30,000 in its heyday (A.D. 1050-1200) and a sprawling assortment of homes, storage buildings, temples, cemeteries, mounds and other monuments in and around what is now St. Louis and East St. Louis, Illinois, the ancient Native American city known as Greater Cahokia was the first experiment in urban living in North America.