Eratosthenes
c. 276–194 BC — Libya/Egypt
Era: Ancient
Brilliance: 9/10 | Stewardship: 7/10 | Composite Index: 63
He measured the Earth with a stick and a shadow.
"Give me a place to stand, and I will move the Earth."
Biography
Calculated Earth's circumference with remarkable accuracy using shadow angles. Chief librarian at Alexandria. Invented the sieve of Eratosthenes.
Key Facts
- Calculated Earth's circumference
- Chief librarian at Alexandria
- Invented the sieve of Eratosthenes
- Accuracy within 2% of modern value
- Called 'Beta' — second best at everything
He measured the planet with a stick and a shadow.
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