'Eratosthenes calculated this c. 230 B.C. using the difference between the sun's angles at 2 places during June'
the Earth\'s circumference
DOWN TO EARTH: Eratosthenes calculated this c. 230 B.C. using the difference between the suns angles at 2 places during June
Eratosthenes calculated this c. 230 B.C. using the difference between the sun's angles at 2 places during June
Eratosthenes calculated this c. 230 B.C. using the difference between the sun's angles at 2 places during June
DOWN TO EARTH
the Earth\'s circumference
DOWN TO EARTH