Eratosthenes- The early Greeks knew the Earth was a sphere based on the shadow of Earth on the Moon during lunar eclipses. Eratosthenes proceeded to use this information to measure the circumference of Earth. (1 gen 220 anni a. C. – 1 dic 220 anni a. C.)
Aggiunto al nastro di tempo:
Data:
1 gen 220 anni a. C.
1 dic 220 anni a. C.
~ 11 months