Have you ever wondered what is holding you up when you sit in a chair? Sir Isaac Newton does. Sir Isaac Newton was an English physicist, astronomer and theologian and much more. He was born January 4, 1963 and died March 31, 1727. He was very influential in the history of science. He made man great contributions to science like his three laws of motion. He also developed the theory of universal gravitation that everything revolves around the sun. He was a great mind and was the father of  Physics with his three laws of motion.