Latitude is measured by your position north or south of the equator but what about longitude? How is your east or west position defined? Discover all about the quest to establish longitude and why it was important, the men behind its discovery, and the establishment of the Prime Meridian at Greenwich.

The Royal Observatory Greenwich is famous world-wide as the home of Greenwich Mean Time (GMT). But what is GMT and why is it so important?

Polite society was thrilling to the idea of an undiscovered continent in the south. Was it even there and what would count as proof if it didn’t exist?