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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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25 agos 240 anni a. C. - 240 B.C. Cyrene (now Shahhat, Libya) Eratosthenes measured the circumference of the earth using the suns angles and shadows from different spots on Earth.

Aggiunto al nastro di tempo:

Data:

25 agos 240 anni a. C.
Adesso
~ 2268 years ago