In 2011, Maritime biologists made a baffling discovery—more than one,three hundred just about great circles scattered over the Mediterranean Sea flooring from the coast of Corsica. These formations, some sixty seven ft vast, sparked many theories: had been they volcanic craters, WWII bomb scars, or some thing even stranger? https://medium.com/@perfectseoservice2017/the-thriller-of-one-three-hundred-best-circles-on-the-mediterranean-seafloor-science-unveils-the-f6327a72d07b