EARTH

School of Earth, Society Environment at the University of Illinois Urbana-Champaign... Two mounds on the Louisiana State University campus may be the oldest known structures in the Americas, with their oldest layers being 11,000 years old. Stratigraphic analysis and carbon dating of ash layers suggest that the mounds were built and used, at least intermittently, over thousands of years. As Prof. Brooks Ellwood notes: "There's nothing known that is man-made and this old still in..... Read full story Are these mounds the oldest human-made structures in the Americas?

Primary location: Urbana United States