And I could see this world we were skiing through was vanishing fast. In a month or so, after the temperature warmed a few more degrees, the ice would all crack up and melt away. The bears had evolved to be part of this cycle, exquisitely adapted, with their white coats and their big strong seal-grabbing front paws. This cold world was their Goldilocks Zone. But if I learned anything on my trip to Baffin, it was that their Goldilocks Zone was disappearing fast. Just like ours.