Aristotle (384 BC – 322 BC) was a Greek philosopher. He is one of the most important founding figures in Western philosophy. A student of Plato, he later became Alexander the Great's personal teacher. His views on the physical sciences challenged medieval scholars to see the world differently. His wrote many articles and books on many different subjects, including physics, poetry, theater, music, logic, linguistics, politics, ethics, biology, and zoology. He is known as the Father of Zoology. Today, many of his writings are lost and only about one-third of the original works have survived through time.