The main reason why you will never see penguins and polar bears in the same region together is beacause the polar bear lives up near the North Pole. They are in the cold areas that are on top of the world. On the other hand, the penguin (such as the emperor penguins) live in the Anartic areas (or south poles) that are at the bottom of the world. Both the polar bears and penguins live and dwell in areas that are extremely cold with a lot of snow and ice. However, the polar bear lives in the northen artic regions and the penguins lives in the southern artic regions. The only time that you may see penguins and polar bears living in the same areas is in a zoo. Otherwise, one lives on top of the world and the other lives on the bottom of the world.
