This book provides an introduction to Newtonian & relativistic mechanics Unlike other books on the topic which generally take a 'top-down' approach it follows a novel system to show how the concepts of the 'science of motion' evolved through a veritable jungle of intermediate ideas & concepts Starting with Aristotelian philosophy the text gradually unravels how the human mind slowly progressed towards the fundamental ideas of inertia physics The concepts that now appear so obvious to even a high school student took great intellectuals more than a millennium to clarify The book explores the evolution of these concepts through the history of science After a comprehensive overview of the discovery of dynamics it explores fundamental issues of the properties of space & time & their relation with the laws of motion It also explores the concepts of spatio-temporal locality & fields & offers a philosophical discussion of relative motion versus absolute motion as well as the concept of an absolute space Furthermore it presents Galilean transformation & the principle of relativity inadequacy of Galilean relativity & emergence of the spatial theory of relativity with an emphasis on physical understanding as well as the debate over relative motion versus absolute motion & Mach's principle followed by the principle of equivalence The natural follow-on to this section is the physical foundations of general theory of relativity Lastly the book ends with some new issues & possibilities regarding further modifications of the laws of motion leading to the solution of a number of fundamental issues closely connected with the characteristics of the cosmos It is a valuable resource for undergraduate students of physics engineering mathematics & related disciplines It is also suitable for interdisciplinary coursework & introductory reading outside the classroom