Future Earth. Computer artwork of the position of Earths continents around 250 million years in the future. A new supercontinent, Pangea Ultima, has formed. The landlocked sea at centre used to be the Indian Ocean. Surrounding it are what used to be Asia (upper right and centre right), South America (lower left), and Africa (upper left). Europe is at top centre. North America is at far left. The Atlantic Ocean no longer exists. The southern tip of South America has joined with SouthEast Asia, above an island continent formed from Australia and Antarctica. The continents are slowly moved over the surface of the Earth by currents in the fluid mantle below the crust. Many continents have formed and broken up during the 4.5billionyear history of the Earth.