
Scientists just uncovered three ancient worlds frozen beneath Illinois for 300 million years
More than 300 million years ago, during the Carboniferous Period, much of northern Illinois outside Chicago — including what is now the Mazon Creek (“muh-ZAHN”) fossil site — was alive with ancient creatures thriving in lush, tropical swamps, river deltas and shallow seas. Now, researchers at the University of Missouri’s College of Arts and Science…