@cmsmith10: Here are a few more things that you could add to your research paper:
Amazingly, some female polar bears build dens with more than one room. They have even found some with “ventilation systems” in the roofs.
Female polar bears don’t start having cubs until they are about 4 or 5 years of age. The babies weigh a little more than a pound when they are born.
Polar bears can swim up to 6 mph.