Polar Bear is in the vertebrate class of mammals. Polar bears live in countries that ring the Arctic Circle: Canada, Russia, the United States (in Alaska), Greenland and Norway They have Adaptational to some of the plants coldest regions and depend on a thick coat of insulated fur, which covers a warming layer of fat. Fur even grows on the bottom of their paws, which protects against cold surfaces and provides a good grip on ice. The bear's stark white coat provides camouflage in surrounding snow and ice.
But under their fur, polar bears have black skin—the better to soak in the sun's warming rays which is why it is so successful today in surviving these fringed regions. Their diet consisting of mainly ringed seals keeps their thick layer of body fat. This helps keep them warm while swimming and maintain their double-layered coat insulating them from the Arctic freezing air. Unfortunately, due to climate change somewhere around two-thirds of the world's bears may be lost. According to the United Nations' Intergovernmental Panel on Climate Change (IPCC), ice coverage is likely to fall below one million square kilometers by 2050. With this loss of land for the polar bears to live, it has led polar bears in the US to be listed as an endangered species in 2008. No sea ice means no seals. And no seals mean there will be no polar bears.
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