-Sir Isaac Newton December 1642-20 March 1727 was an English physicist and mathematician who is widely regarded as one of the most influential scientists of all time and as a key figure in the scientific revolution.His bookPhilosophiae Naturalis Principia Mathematica (“Mathematical Principles of Natural Philosophy'自然 哲学的数学原理)，first published in1687,laid the foundations for most of classical mechanics. ▪Sir Isaac Newton ( December 1642 – 20 March 1727 was an English physicist and mathematician who is widely regarded as one of the most influential scientists of all time and as a key figure in the scientific revolution. His bookPhilosophiæ Naturalis Principia Mathematica (“Mathematical Principles of Natural Philosophy”自然 哲学的数学原理), first published in 1687, laid the foundations for most of classical mechanics