Holes the size of city blocks are forming in the Arctic seafloor
An autonomous underwater vehicle is recovered after completing a seafloor mapping mission in the Arctic Ocean. The remotely operated vehicle (foreground) is used to conduct visual surveys of the newly mapped seafloor. (CNN) Marine scientists have discovered deep sinkholes — one larger than a city block of six-story buildings — and ice-filled hills that have formed “extraordinarily” rapidly on a remote part of the Arctic seafloor. Mapping of Canada’s Beaufort Sea, using a remotely operated underwater vehicle and ship-mounted sonar,…
