Lines of longitude (or meridians) measure distance around the Earth. They are also used to measure time, though they are sometimes manipulated around borders of countries.
Time varies around the Earth based on what lines of longitude they are between. All lines of longitude meet at both he North Pole and the South Pole? So what time is it at the poles?
Time varies around the Earth based on what lines of longitude they are between. All lines of longitude meet at both he North Pole and the South Pole? So what time is it at the poles?