Pangea is a supercontinent that existed in past geological times. A. Wegener, the originator of the theory of continental drift, first proposed the concept that the continents once formed a continuous land mass that was surrounded by a super ocean (i.e., Panthalassa). This supercontinent was called Pangea. Pangea was first divided into the supercontinents of Laurasia in the north and Gondwana in the south, which were separated by the Tethys Ocean, the sea in the middle of the land. The latest version of the hypothesis with respect to Pangea is in connection with the supercontinent Rodinia, which existed from 1,000 to 900 million years ago. It is postulated that all existing continents came from this supercontinent. This hypothesis has gained popular recognition.