The megacontinent that 250 million years ago, Pangaea gathered most of the land surface, was considered uniform, and a vast land Pangaea (.supercontinent ) existed during the Paleozoic and Mesozoic eras, before the continents separated into their current configurations. It formed about 335 million years ago and began to fragment about 175 million years ago. In terms of area, Pangaea covered about 148 million square kilometers, which is about 29% of the Earth's land surface. This enormous land mass included most of the areas that today constitute the continents of Africa, America, Eurasia, Australia and Antarctica.
