Our adventures in subatomic wonderland with particle physicist Bruce Schumm continue. We'll pick up where we left off last week, searching for underlying order—maybe even simplicity—amidst all the quantum complexity. We'll learn about the Feynman rules, symmetry and gauge theory, as well as gaps in the Standard Model of particle physics, the search for missing pieces (like the Higgs field) and the possibility of grand unification (a “theory of everything”).