Cross breeding plays an important part in the future of endangered animals. In the case of polar bears it may lead more quickly to the extinction of them. Within the past 10 years scientist have found several bears sharing DNA, in this case the two bears sharing the DNA are the polar bears and the grizzly bear. The earth has been heating up which means that the polar bears are getting pushed out of there land space, and are even starting to die off. The polar bears have to expand into the grizzly bear territory, since the polar bears and grizzlies are expanded all over the place they still need to mate, so the polar and grizzly bears are the closest match up. The male grizzly bear will mate with the female polar bear, this is because the male
