Newark Earthworks Center What are the Newark Earthworks?
The largest complex of geometric earthworks ever built anywhere in the world. Ancestors of today’s Native Americans built these earthworks covering more than four square miles two thousand years ago. Two huge features remain today: a Great Circle 1200 feet in diameter with walls 14 feet high and an Octagon (enclosing 50 acres) connected to another circle (enclosing 20acres ) with walls that are five to six feet high. Recent research has uncovered a high level of both geometric and astronomical understanding encoded in these walls. The perimeter of the Great Square is equal to the circumference of one circle, for instance; the area of the square is equal to the area of another circle. Further, all eight stand-still points in the 18.6 year cycle of the moon are encoded in the structure of the Octagon and surrounding features.
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