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Category
Era
3 figures
Su Song
1020 – 1101Built an astronomical clock tower with the first known escapement chain drive.
China·Engineering · Astronomy
Shen Kuo
1031 – 1095Described the magnetic compass and deduced geological deep time.
China·Astronomy · Engineering · History
Sejong the Great
1397 – 1450Commissioned Hangul, the alphabet that made Korea literate.
South Korea·Literature · Engineering