1. 北极圈：纬线 woof | 北极圈 the Arctic Circle | 南极圈 the Antarctic Circle
1. The findings seem to undermine the theory that the woolly rhinoceros originated in the Arctic Circle.
2. But one side effect of thawing permafrost in the Arctic Circle has been the release of higher levels of nitrous oxide.
3. They are mainly distributed in forested areas within the arctic circle, for example the islands in the north of Canada.
4. The intense psychological drama is set at a remote meteorological station in the desolate Russian Arctic Circle.
5. It was founded on the permanently moving Arctic ice last April and has almost completed a full circle around the North Pole.