Aristotle (and Alexander)

Although much of what Aristotle taught is wrong, he is remembered as the Father of Science because of his method of understanding the world. He insisted that we first observe the world and compare our theories to our observations. If our theories disagree with observations, they are wrong. He catalogued and studied all aspects of the natural world, from physics to biology, and everything in between. But his life was intertwined with that of his most famous student, Alexander the Great.