Polar bears are the largest land carnivores, weighing up to 1,700 pounds. They live in the Arctic regions of the northern hemisphere, where they hunt seals, fish, walruses and beluga whales. Female polar bears typically give birth to 2 cubs every 4-5 years and will care for them for over 2 years. There are currently estimated to be between 20,000-25,000 polar bears remaining worldwide.