Archaeologists found at the bottom of Lake Michigan in the U.S. a circle of boulders reminiscent of British Stonehenge.
The stones at the bottom of the lake do not appear to be man-made; they are not connected to each other in any way. But they form a perfect geometric shape. According to scientists, about 10,500 years ago, the water level in the Lake Michigan basin dropped dramatically and held at its lowest point for at least 3,500 years. And then, 5,000 years ago, the water level rose to the current levels.
Using data from diving and using modern research methods, Dr. John O’Shea, curator of Great Lakes Archaeology at the University of Michigan Museum of Anthropological Archaeology, concluded that there was a hunting structure under the water that was used as a trap. The passages between the stones were used by ancient people to drive herbivorous animals grazing inside the circle directly into the hands of the hunters who were waiting for them.