Churchill, in Manitoba, Canada, is known as the “Polar Bear Capital of the World.” On my flight aboard Calm Air, I relaxed with the onboard magazine, “Up Here.” One story grabbed my attention: “Polar bears are the largest, strongest, and most bloodthirsty of Arctic predators,” wrote Dean Cluff, wildlife biologist for the Northwest Territories government. “They only know how to hunt and kill to earn their next meal.”