Physics and Astronomy Calendar

The laws of physics for matter and antimatter are very, very similar. Yet we live in a Universe where matter dominates over antimatter by many orders of magnitude. When and how did this imbalance occur? This is a question at the root of our existence, but one for which, as yet, we do not have a satisfactory answer. I will review the physics of this problem, and the possible answers that are suggested by our current understanding of the history of the Universe and of the differences between the behavior of matter and antimatter, known as CP violations.