Pangaea

Over the course of the planet's 3.5 billion year history, several super-continents have been formed and broken up as a result of the churning and circulation in the Earth's mantle.

The breakup and formation of super-continents has dramatically altered the history of this planet. About 300 million years ago, the Earth was not divided into seven continents as we see now, but instead it was one massive super-continent called Pangaea.

Pangaea was surrounded by a global ocean called Panthalassa, and it was fully assembled by the Early Permian Period (some 299 million to 272 million years ago).