MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Pangea, computer illustration. This supercontinent formed in the late Paleozoic Era (about 300 million years ago) when most of the Earth's land surface moved together due to continental drift. It broke up again, leading to the formation of today's continents, about 200 million years ago. It was not the first time that such a supercontinent had formed and split. It is thought that Pangea's effects of altered climate patterns and reduced coastline caused many species to become extinct.
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