It was around 250 BCE when ... One can understand that if the earth is a sphere. In fact, from the angle of the sun’s rays from the vertical on June 20 and the distance from Alexandria to Syene he was ...

But if you live near the equator, you get almost ... to South pole (known as the meridional circumference) Earth is only 40,008 km (24,860 miles) around. It is the combination of the Earth ...