Zhang Heng
78-139
Chinese mathematician and astronomer who developed the world's first seismoscope, as well as one of the earliest rotating globes. His seismoscope, an ingenious invention that...
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Zhang Heng
78-139
Chinese Astronomer and Mathematician
Zhang Heng was a Chinese mathematician and scientist, born in the first century A.D.In addition to being one of the emperor's astrologers,...
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Zhang Heng
