Plato described the lost island Atlantis as a naval power that conquered much of Western Europe and Northern Africa in 9000 B.C. After a failed attempt to invade Athens, Atlantis supposedly sunk into the ocean in a single day. Even in his own time, Plato's story was considered to be just that — a story. In modern times, however, historians and archeologists say that satellite images of Santorini show a sunken island in the middle of the group. Others think that Plato was mistranslated and that Atlantis existed in 900 B.C. — the same time that the Minoan civilization on Crete was destroyed by a tsunami. In 2011, a team of archeologists claimed they located Atlantis under the mud flats in southern Spain.