In ancient times, it was generally believed that the earth was square, but with the continuous development of science, people gradually realized that the earth was actually round. So, who discovered the fact that the earth is round?
The ancient Greek philosopher Pythagoras was one of the first to prove that the earth was round. He came to this conclusion by observing astronomical phenomena and performing mathematical calculations. In his opinion, a circle is a perfect shape, and the Earth, like a planet, orbits the Sun in a circular orbit.
Another important discoverer was the ancient Greek mathematician Pichuli. By studying the Earth's shadow and calculating astronomical phenomena such as lunar eclipses, he came to the conclusion that the Earth is round. He also proposed mathematical models to describe the shape of the Earth, which became the basis for later studies of the shape of the Earth.
In addition to this, many scholars and scientists throughout history have provided evidence and support for the fact that the Earth is round. For example, the shape of the earth was studied and described by the ancient Greek geographer Strabo and the Roman geographer Plutarch, among others.
In China, ancient scholars also found evidence that the earth was round. For example, there is a record of the shape of the earth in the book "Zhou Ji Suanjing", and the astronomer Zhao Youqin of the Northern Song Dynasty measured the size and shape of the earth through experiments and came to the conclusion that the earth is round.
In general, the fact that the earth is round was discovered and proven by many ancient scholars and scientists. This fact had an important impact on the later development of astronomy, geography and physics.