In science, we often see new advances and deep insights emerging from the collision or intersection of what appeared to be separate research areas. The theme of my colloquium will be an ongoing collision between the three ideas listed in my title which has been generating interesting new insights into a variety of fields, eg, condensed matter physics, quantum field theory and even quantum gravity. I will give an introduction to each of these three ideas separately and then discuss the intersections that have been generating new insights in recent years. Speaker/Presenter: Robert Myers, Perimeter Institute for Theoretical Physics