Exhibits at Cahokia Mounds State Historic Site near Collinsville have shown ancient peoples as hunters, fishers and pottery makers.
But Tim Pauketat's new book highlights a darker side, saying it appears they also practiced large-scale human sacrifices.
The book is Cahokia: Ancient America's Great City on the Mississippi. The link above is to a much longer story in the Belleville News-Democrat.
Meanwhile in related news, construction crews uncovered 800 to 900-year-old human remains last week while digging a foundation for a new home in Collinsville. Experts believe them to be from the Mounds civilization.