There are a number of important unanswered questions in the world of Physics. Why do the known particles have the masses and energies that they do? What exactly is Charge? What is Dark Matter? What is Dark Energy? Why is there more matter than anti-matter? The list seems endless. But in many situations, existing theories do not provide adequate answers to these questions. This book presents a new theory which combines a containment mechanism and electromagnetic waves to produce what is commonly referred to as matter. Matter comprises self-sustaining resonant electromagnetic cavity waves. Visually, the theory is simple and easy to understand. Particles and waves can be pictured using this theory. Particles are not abstract constructs, they are real things. This theory provides measurable, predictable answers to the questions posed above and many more. This book allows the reader to "visualize" what electrons, protons and even Super-Massive Black Holes look like. It describes "Dark Matter and Dark Energy" and provides a description of how all of the atoms are put together. In relatively simple terms it explains what gravity is and why it bends light and goes on to describe the origin of galaxies.