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Polar bears live around the northernmost continent of the earth, the arctic continent. As winter temperatures in the arctic are usually around -34 degrees centigrade and can reach -69 degrees Celsius The polar bear turned out to be a reliable swimmer. Therefore the scientific name of this animal is Ursus maritimus. This animal uses its huge forelegs to paddle and their hind legs as a rudder. The bear is also known to swim more than 60 miles (100km) without rest.