Science is the systematic process by which an individual or a society builds and develops information through precise, testable predictions and theories about the universe. In the broadest sense, science can be the consistent self-organization of increasing complexity, with the progress of science always tending toward self-organized progress. Science deals with reality by attempting to understand it, testing various theories, and generalizing various subject matters. For instance, in biology, a scientist may be regarded as a professor who has made significant advances in his field through repeated experiments and research in his laboratory. He may be an expert in some areas such as genetics, anatomy, cell and tissue physiology, etc., and be able to prove the facts based on his systematic approach. He may be regarded as an inventive genius whose discoveries have changed the course of history.