Globe and Mail: In less than two decades, the Arctic Ocean could be all but ice-free all summer, every summer, and a swiftly melting North would have potentially devastating implications for the rest of the planet, British researchers say. An on-the-ground observation sampling of ice thickness, the first of its kind, indicates the Arctic Ocean’s frozen cover is rapidly thinning, according to the Polar Ocean Physics Group at the University of Cambridge. The area will be open and navigable during the …