Churchill, Manitoba, is home to the world's only polar bear jail—a unique conservation program that protects both hungry bears and local residents during peak bear season.Every fall, as Hudson Bay begins a slow freeze, hundreds of polar bears converge near Churchill, Manitoba, waiting. Once the ice is set, they can head back out and hunt ring seals, but as they wait, the town and its bears exist in an uneasy standoff. The bears want to eat, and …