Aristotle (384-322 BC)

Student of Plato and a tutor to Alexander the Great, Aristotle was a genius Greek philosopher and scientist of the ancient age. Born on 384 BC Aristotle was a biologist, a zoologist, ethicist, a political scientist and the master of rhetoric and logic. He also gave theories in physics and meta physics. Aristotle gained knowledge in different fields with his expansive mind and prodigious writings. However, only a fraction of his writings are preserved at present. Aristotle made collections to the plant and animal specimens and classified them according to their characteristics which made an standard for future work. He further gave theories on the philosophy of science. Aristotle also elaborated and estimated the size of earth which Plato assumed to be globe. Aristotle explained the chain of life through his study in flora and fauna where it turned from simple to more complex.