In our Oxford Mathematics London Public Lecture Roger Penrose in conversation with Hannah Fry reveals his latest research, a veritable chain reaction of universes, which he says has been backed by evidence of events that took place before the Big Bang. With Conformal Cyclic Cosmology he argues that, instead of a single Big Bang, the universe cycles from one aeon to the next. Each universe leaves subtle imprints on the next when it pops into being. Energy can 'burst through' from one universe to the next, at what he calls ‘Hawking points.’ The Oxford Mathematics Public Lectures are generously supported by XTX Markets.