Sir Isaac Newton is the scientist known for the discovery of the laws of motion. In his work "Philosophiæ Naturalis Principia Mathematica," published in 1687, he formulated three fundamental laws that describe the relationship between the motion of an object and the forces acting upon it. These laws laid the groundwork for classical mechanics and revolutionized the understanding of physical concepts such as inertia, acceleration, and action-reaction principles. Newton's contributions extended beyond motion; he also made significant advances in mathematics and optics, solidifying his position as one of the most influential scientists in history.