Revolutionary new concepts about elementary particles, space and time, and the structure of matter began to emerge in the mid-1970s. Physicists developed a theory called The Standard Model that explains what the world is made of and what holds it together. It is a comprehensive theory that explains all of the hundreds of particles and their complex interactions. This study group is devoted to understanding its theoretical foundations.This group will utilize mathematics to develop the theories and to explain and apply the principles. Our studies will be based on an online video lecture series "New Revolutions in Particle Physics," originally givenby world renowned physicist Leonard Susskind, Director of the Stanford Institute for Theoretical Physics (SITP) in Stanford’s Continuing Education Program. The study group is intended to build a broad and comprehensive minimum theoretical knowledge of particle physics for non-physicists and science groupies.We welcome all members with a curiosity and interest in understanding the nature and world of the atom. General familiarity with principles of classical physics and calculus is required. Internet access is essential.