Who was the individual who is credited with establishing the size of earth?
multipleQAs
Who was the individual who is credited with establishing the size of earth around 240 BC? Who was the individual who is credited with establishing the size of earth  during the middle ages? Who was the individual who is credited with establishing the size of earth using the star Canopus? Who was the individual who is credited with establishing the size of earth by adding to Eratosthene's estimate?
Eratosthenes of Cyrene Eratosthenes
al-Biruni Abū Rayḥān Muḥammad ibn Aḥmad Al-Bīrūnī Biruni
Posidonius
Hipparchus Hipparchus of Nicaea