For What was China's Han Dynasty most noted?

The Han dynasty (206 BCE–220 CE) is known its long reign and its achievements, which included the development of the civil service and government structure; scientific advancements such as the invention of paper, use of water clocks and sundials to measure time, and development of a seismograph

they are best known for the cliff pueblos found throughout arizona, new mexico, colorado and utah. and for their development of desert farming.

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-lavira: )