Visitors eager to see polar bears saved the remote Canadian town from shrinking out of existence when a military base closed in the 1970s

Warming temperatures may be changing the ways ice forms, making it more likely to stick to and injure polar bears in two far north populations.

Churchill is a remote northern Manitoba town that not only lives with polar bears next door, but loves it. That's because the predators attract the tourists who are now an important part of Churchill's economy.