200? Try 6000: http://www.historyworld.net/wrldhis/plaintexthistories.asp?historyid=ab57 http://www.historyworld.net/wrldhis/plaintexthistories.asp?h... >From

200? Try 6000: http://www.historyworld.net/wrldhis/plaintexthistories.asp?historyid=ab57 http://www.historyworld.net/wrldhis/plaintexthistories.asp?h... >From about 4000 BC oxen are harnessed and put to work. They drag sledges and, somewhat later, ploughs and wheeled wagons (an almost simultaneous innovation in the Middle East and in Europe). The plough immeasurably increases the crop of wheat or rice. The wagon enables it to be brought home from more distant fields.