In 2011, Marine biologists produced a baffling discovery—in excess of one,300 just about perfect circles scattered across the Mediterranean Sea floor off the Coastline of Corsica. These formations, some sixty seven toes large, sparked countless theories: had been they volcanic craters, WWII bomb scars, or one thing even stranger? https://medium.com/@perfectseoservice2017/the-thriller-of-one-three-hundred-best-circles-on-the-mediterranean-seafloor-science-unveils-the-f6327a72d07b