7 interesting facts about polar bears

• Polar bears have good eyesight, with excellent depth perception.
• Polar bears hear the same range of sounds as people.
• Polar bears can dive about 4.5 m (15 inches) underwater.
• Polar bear have a sharp sense of smell and can detect a seal buried 3 inches-deep in snow, from 1 km away.
• There is a thick layer of fatty-blubber inside the body of a polar bear, which helps him warm.
• A polar bear's coat is about 2.5 to 5 cm (1-2 inches) thick.
• Under the pure white hair, the skin of a polar bear is totally black.