They are specially marked because, they are the most north and south on the lines of latitude. During the summer solstice, the sun beams directly on these points ( the two arctic circles)
No. The circles are circles. The poles are points. If the circles were points, then they might be called the Arctic and Antarctic Poles, but they wouldn't be called the Arctic and Antarctic Circles since they would be only points.
There is only one Arctic Circle.
arctic circles
One.
Near the Arctic Circle.
Latitude maps include both the Arctic and Antarctic Circles.
the Arctic one
Polar Zones
67 degrees i think.
roughly 1700 miles
66.5622 degrees north and south
The Arctic circle is 66 33′ 39″ north and the Antarctic is the same south of the equator.Every longitude crosses both circles.