We know from history many various civilizations. Civilizations like Sumerian (4000 BC), Egyptian (3000 BC), Minoan (2000 BC), and Babylonian (1700 BC). Later, the Greek civilization, throughout the Macedonian empire, ranged as far east as northern India and as far south and west as Egypt. Then Romans were the rulers of the whole area from Constantinopole, to Palestine and North Africa to Britain. After centuries, the Vikings, people from what is now Norway, Sweden, and Denmark, established colonies in northern France, Sicily, England, and Ireland. During the 13th century AD, Mongols created a vast empire in Central Asia and the Mongol Empi