14 sept. 240 av. J.-C. - Eratosthenes
Description:
Eratosthenes estimates the earth's circumference (only off by just under 25,000 miles). Due to the knowledge of how large the earth was, it seemed unreasonable for it to be spinning so quickly without any evidence of its movement.Ajouté au bande de temps:
Date:
14 sept. 240 av. J.-C.
Maintenaint
~ Il y a 2268 ans