One of the hottest topics in modern physics is trying to understand the scattering of fundamental particles with neither shape nor size - one step up from nothingness. Amazingly, attempts to understand these simple processes theoretically require state-of-the-art mathematics. Theorist Ruth Britto, at Trinity College Dublin, is one of the leaders of this branch of physics. In this edition, she describes how she became interested in this subject and why she finds it so fascinating. This is one of a series of interviews given by world-class experts to Graham on the themes he explores in his new book The Universe Speaks in Numbers. For information regarding your data privacy, visit acast.com/privacy