"Isaac Newton's Principia Mathematica," published in 1687, is a foundational work in physics and mathematics. In this book, Newton formulated the laws of motion and universal gravitation, explaining how objects move and interact in the universe. His three laws of motion describe the relationship between a body and the forces acting on it, laying the groundwork for classical mechanics. The Principia Mathematica also introduced the concept of calculus, although Gottfried Wilhelm Leibniz independently developed it around the same time. Newton's work revolutionized science, influencing countless fields and establishing a framework for understanding the physical world that remains relevant today.