Polar bears live in the Arctic. The Arcticcontinent is а huge piece of ice on the еarth. Polar bear is a kind of bear in Ursidae. It is the largest land carnivore in theworld.

It is also called white bear. The polar bear's big paw enables it to use the front paw as а "paddle" to swim in the water, while the wide back paw is used to Walk on the ice and in the snow; the senseof smell is extremely sensitive, which саn capture the smell of a kilometer around or one meter under the ice and snow.

However, due to the global warming caused by human beings, namely the "greenhouse effect", the Arctic ice sheet melts.

北極熊頭部相對棕熊來較長而臉小，耳小而圓，頸細長，足寬大，肢掌多毛，面板呈黑色。成年北極熊直立起來高達2.8米，肩高1.6米。雄性北極熊體重為300~800公斤，雌性為150~400公斤。

熊掌可達25釐米寬，熊爪可超過10釐米，北極熊奔跑的時速可達40公里，還能在海里以時速10公里遊97公里遠。

北極熊是熊科熊屬的一種動物，是世界上最大的陸地食肉動物，又名白熊。面板為黑色，由於毛髮透明故外觀上通常為白色，也有黃色等顏色，體型巨大，兇猛。