Astronomy
Chinese astronomers establish that the length of the year is 3651/4 days.
ConstructionA stone-filled dam faced with basalt blocks about 150 m (500 ft) long and 6 m (20 ft) high is built at the northern end of a low, flat valley called Orontes during the reign of Egyptian Pharaoh Seti I. It creates the Lake of Homes that is 5 m (17 ft) deep, and which persists even today. See also 2500 bce Construction.
TransportationSpokes for wheels, first used in Mesopotamia around 2000 bce, are in use in China. See also 1500 bce Transportation.



