On the Trail of the Nephilim: Episode 2 - Mathematical Mysteries of the Moundbuilders

Did the academic establishment destroy evidence of an ancient and highly-developed civilization that once roamed the hills and valleys of the Midwest United States? Did the academic establishment destroy evidence of an ancient and highly-developed civilization that once roamed the hills and valleys of the Midwest United States? Did the academic establishment destroy evidence of an ancient and highly-developed civilization that once roamed the hills and valleys of the Midwest United States? Did the academic establishment destroy evidence of an ancient and highly-developed civilization that once roamed the hills and valleys of the Midwest United States?