Happy National Polar Bear day!
A polar bear is a large carnivorous bear found mainly in the Arctic circle. They have semi transparent fur, which appears white.
The Polar bear is thought to have evolved from the brown bear, who most likely lived in North Eurasia. The brown bear began to evolve to live in more Arctic temperatures as Arctic Seals became a sustainable food source. The physical adaptions to become ice hunters and survival of the fittest evolved this brown bear into the modern polar bear. This began about 130,000 years ago.
About 10,000 – 20,000 years ago fossils show that the Polar bears molars began to change from that of the brown bear.
When the Polar bear was first documented, two subspecies were identified. This was later invalidated. In modern times, 9 subspecies have been identified with 5 being listed as endangered. In 2015 it was estimated that there were 22,000 – 31,000 polar bears left in the wild, with the number declining. Factors that have listen the Polar bear as endangered are pollution, contamination and climate change.