Environment: A Plethora of Polar Bears

Each fall the white beasts overrun Churchill, Manitoba

Halloween can be very scary in the little Canadian town of Churchill (pop. 1,200), on the western shore of Hudson Bay. This fall, before Churchill's youngsters were allowed to go out trick-or-treating, armed men checked out every street and back alley. Even after the masked and costumed kids were let loose, some adults stood guard on the outskirts of town. It was not ghosts and hobgoblins that were on their minds, but polar bears.

Though few people ever get to see the furry white beasts, except for...

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