Who and why said that the Earth has the shape of a ball?

Probably, many thought about Copernicus, but no, this is not him. Pythagoras was the first to say that the earth has the shape of a ball. True, he did not begin to prove anything to anyone, he simply asserted it as a fact, and the point is that he considered the ball to be the most correct and most ideal figure in the world. Aristotle, two centuries later, also argued that the earth has the shape of a ball, as evidence he cited the fact that during a lunar eclipse the moon was covered by the shadow from the ball.