Gordon Kane, Victor Weisskopf Distinguished Professor of Physics gives us a primer on string theory. It is an exciting field because it can address most or all of the questions we hope to understand about the physical world, about the quarks and leptons that make up our world, the forces that act on quarks and electrons to form our world, cosmology, and much more. Professor Kane explains why string theory is testable in the same ways as the rest of physics, why many people including string theorists are confused about that, and how string theory is already or soon being tested in several ways, including LHC physics and Higgs boson physics.