He lives in Alexandria, now Egypt, near the Nile. When he saw a well in Syene, at noon the sun’s shadow struck the well and saw no shadow outside. So when he returned to his hometown of Alexandria, he performed an experiment similar to that of the well. He planted a stick on the ground and studied the shadow of the stick. By noon, when the sun was setting on a well in Sydney, the shadow of a stick in his hometown of Alexandria was slightly northerly.