A look at the evidence for the Earth being round or spherical. Aristotle’s reasoning is explained. The evidence includes a ship’s hull disappearing first over the horizon, the stars ...

Carl Sagan explained the thought process of the ancient Greek scientist Eratosthenes, who determined the circumference of the Earth.

A number of ancient cultures believed that the Earth was flat because, simply, they didn’t know any better. But incredibly, there are people today who still believe that the Earth is flat ...

was the first person to propose that the Earth was round sometime around 500BC. Although we cannot be sure whether he actually said it or proved his theory, the concept of the spherical Earth ...