Eratóstenes

Inventions and discoveries · 4

1. c. 255 BCEArmillary sphereScientific instrument · inventor
2. c. 240 BCESieve of EratosthenesDiscovery · discoverer
3. c. 240 BCEMeasurement of Earth's circumference (Eratosthenes)Invention or technique · inventor
4. c. 240 BCEMeasurement of Earth circumferenceExperiment · discoverer