Here's the Largest Ocean that Existed on Earth, Not the Pacific

Even today, scientists think of Earth's oceans as a single 'world ocean', given that they are interconnected at various points, such as the Atlantic mingling with the Pacific at the bottom of South America and connecting with the Indian Ocean beneath Africa.

However, as defined by the continents, the Pacific has held the title of the world's largest ocean since the death of Pangea some 200 million years ago.

But if current projections of tectonic plate movement are correct, Australia will split the Pacific in half over the next 70 million years. At the same time, the Atlantic will widen, taking the crown of the largest ocean on Earth.