Experimental physics is considered to have reached a high point with the publication of the Philosophiae Naturalis Principia Mathematica in 1687 by Sir Isaac Newton (1643–1727). In 1687, Newton published the Principia, detailing two comprehensive and successful physical laws: Newton's laws of motion, from which arise classical mechanics ; and Newton's law of universal gravitation, which describes the fundamental force of gravity. Both laws agreed well with experiment. The Principia also included several theories in fluid dynamics.