In 2011, Marine biologists built a baffling discovery—more than 1,300 virtually great circles scattered through the Mediterranean Sea ground from the Coastline of Corsica. These formations, some sixty seven ft extensive, sparked innumerable theories: were they volcanic craters, WWII bomb scars, or some thing even stranger? Within this video https://medium.com/@perfectseoservice2017/the-thriller-of-one-three-hundred-best-circles-on-the-mediterranean-seafloor-science-unveils-the-f6327a72d07b