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Ancient Origins Tour IRAQ

Ancient Origins Tour IRAQ Mobile

Hydraulic engineering

Zhang Heng's odometer, a mechanical carriage.

The Famous Ancient Chinese Inventions of Zhang Heng

Zhang Heng (78-139 AD) was a Chinese astronomer, mathematician, inventor, geographer, cartographer, artist, poet, statesman, and literary scholar from Nanyang, Henan Province, China. He is noted for...