Circle of latitude can be calculated by a common sine or cosine function. The 60th parallel north or south is half as long as the Equator (disregarding Earth's minor flattening by 0.3%). A circle of latitude is perpendicular to all meridians. The latitude of the circle is approximately the angle between the Equator and the circle, with the angle's vertex at Earth's centre. The equator is at 0°, and the North Pole and South Pole are at 90° north and 90° south, respectively. The Equator is the longest circle of latitude and is the only circle of latitude which also is a great
The Devil of the Earth called Demonobirth suddenly appears. Who is he, and what will happen to the boys? The story takes an unexpected turn. The Devil of the Earth "The Devil of the Earth" is an anti-war science fiction short story depicting a giant city built under the ground as a shelter from world wars, and conspiracies over its construction. One day, in a small village, a large project to build an underground city begins under the supervision of Dr. Takano with the specific aim of preparing for nuclear war. Eiji and his brother Eizo are forced to get involved in terrible plots over