Zhang Heng
78–139 AD — China
Era: Ancient
Brilliance: 9/10 | Stewardship: 8/10 | Composite Index: 72
He built a machine that felt earthquakes 500 miles away.
"The sun is like fire and the moon is like water."
Biography
Han Dynasty polymath. Invented world's first seismoscope, improved water clock, mapped 2,500 stars, calculated pi precisely, wrote acclaimed poetry.
Key Facts
- First seismoscope (132 AD)
- Mapped 2,500 stars
- Improved water clock, built celestial globe
- Accomplished poet and painter
- Calculated pi more precisely than contemporaries
He could feel earthquakes from 500 miles away — in 132 AD.
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