In 2011, Maritime biologists built a baffling discovery—above 1,300 just about perfect circles scattered across the Mediterranean Sea floor off the coast of Corsica. These formations, some sixty seven toes huge, sparked plenty of theories: were they volcanic craters, WWII bomb scars, or something even stranger? In this video https://medium.com/@perfectseoservice2017/the-thriller-of-one-three-hundred-best-circles-on-the-mediterranean-seafloor-science-unveils-the-f6327a72d07b