Scientists uncover 40 large craters beneath Lake Michigan during mapping mission

Scientists have discovered about 40 large craters beneath Lake Michigan using sonar technology. These craters, measuring 500 to 1,000 feet in diameter, were found during a mapping mission in the Wisconsin Shipwreck Coast National Marine Sanctuary. The craters are irregularly shaped and range from 20 to 40 feet deep. Researchers are investigating their formation, with theories suggesting they may be linked to ancient glacial activity or underwater geological processes. The survey also revealed diverse marine life thriving in the craters. Researchers plan to continue studying these formations to understand their significance in Lake Michigan's ecosystem.