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University of Cincinnati researchers discovered the 2,000-year-old site is much larger than previously believed -- one dam was nearly 200 feet high -- and its berms stretch nearly 4 miles in length making it twice as large as any other American Indian earthworks in Ohio, and one of the largest in the nation.

"This site was originally described by William Henry Harrison as a great military fort. What we've discovered this summer is that it is not in any way, shape or form a military fort", said Assistant Professor Ken Tankersley who led the study.

And physical evidence says it was probably the women of the Shawnees who constructed the earthworks.

"It amazes me that when you think of some of the great engineering feats in prehistory, we've always had this male bias that guys must have been doing this", Tankersley added. "But the evidence we have at hand turns this around and suggests that it actually must have been the women who were doing this work."

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