It describes how latitude is measured in degrees north or south of the equator and how longitude is measured east or west of the Prime Meridian. The video illustrates the division of the Earth ...

Time in countries to the east of the Prime Meridian is always in front of that in the UK. Time in countries to the west of the Prime Meridian is always behind that of the UK. Image caption ...

When longitude was first understood sailors measured their position by degrees east or west of their port of departure. Later many countries established their own prime meridians. It was not until the ...