Arctic Circle
The Arctic Circle is a hypothetical circle with a latitude value of 66.5 ° north latitude, which is the dividing line between the northern frontal zone and the northern temperate zone, and the horn angle of the horn angle (the latitude and longitude of the Tropic of Cancer). The north of the Arctic Circle is known as the "Arctic Circle". Often, the area in the Arctic Circle is called the Arctic, consisting of Arctic Ocean and the surrounding land, which includes Greenland, the Nordic countries, northern Russia, northern Alaska, and northern Canada. There are many islands in the Arctic Circle, the largest is Greenland. Due to the cold, the Arctic Circle within the biological species rarely. Plants to lichen, moss-based, animals are polar bears, seals, whales and so on. The Arctic Circle is also the line between the day and the night, and the area north of the Arctic Circle will appear in the summer, and there will be a night in the winter. ...