Pangaea

This is what Pangea would look like with our current international borders (Interactive Map)

About 300 million years ago, Earth did not have seven continents (or eight if you count Zealandia), but one supercontinent called Pangea, which was surrounded by one ocean called Panthalassa. About 200 million years ago, the supercontinent began to break up and the world as we know it today started to take shape.