Ole Peters received a Ph.D. in theoretical physics from Imperial College London in 2004. He then moved to the US, where he held a joint fellowship at the Santa Fe Institute and the Center for Nonlinear Studies at Los Alamos National Laboratory. His work there focused on problems in statistical mechanics with an application to atmospheric physics, which later led him to join the Climate Systems Interaction group at UCLA. Following academic visits in Budapest, Beijing and Hamburg, he returned to Imperial College in 2009 and is currently a member of the Mathematics Department and the Grantham Institute for Climate Change. His most recent work is concerned with the conceptualisation of randomness in probability theory. In particular, he is interested in so-called non-ergodic random systems whose behaviour in time cannot be summarised by a probability distribution. When he doesn’t think about ergodicity he spends as much time as he can in the ocean, recently on vessels ranging in size from a 5’4” surfboard to a three-mast tall ship.