The 81st Parallel North is a circle of latitude located 81 degrees north of the equator. It runs through the Arctic region, primarily over the Arctic Ocean and parts of the surrounding sea ice. This latitude is significant for understanding the geography of the polar regions and is often used in scientific research related to climate and environmental studies. At this latitude, the climate is extremely cold, with long periods of darkness in winter and continuous daylight in summer. The area is sparsely populated, with few human settlements, but it is home to various species of wildlife adapted to the harsh conditions, including polar bears and seals.