The first is a commonplace. By combining analysis with experimentation-by combining theorizing with systematic observation of natural phenomena-men like Gali­leo and Newton launched an intellectual revolution and helped to usher in our modern age of science. Not only did they dis­cover truths about the physical world that continue to be rele­vant and important, but they also developed new methods of studying nature that have proved to be of wide usefulness in many areas of study and research.