THE WORLD'S first earthquake detector was invented in A.D. 132 by Zhang Heng (A.D. 78-139), an outstanding scientist of the Eastern Han dynasty. While he was serving as court astronomer, there were...
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THE WORLD'S first earthquake detector was invented in A.D. 132 by Zhang Heng (A.D. 78-139), an outstanding scientist of the Eastern Han dynasty. While he was serving as court astronomer, there were...