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Was invented in Egipt, egyptians to cross the rivers easier -
Was invented in Ancient Egipt, the Phoenicians and Greeks, to cross the rivers easier and with more people -
Was invented in China, chinese, to cross the rivers easier -
Was invented in U.K, Christopher Cockerell, to cross the rivers easier and faster -
Was invented in Scotland, Sir Persi Elly Bates, o carry millions of people and goods