Roberto Livi is Honorary Professor of Theoretical Physics at the University of Florence and an associate member of the National Institute of Nuclear Physics (INFN) and of the Institute for Complex Systems of the National Research Council (CNR). His research is focused on nonequilibrium statistical physics, and he has extensive experience teaching courses on statistical physics. He is the current President of the Italian Society of Statistical Physics. Paolo Politi is a Research Director at the Institute for Complex Systems of the National Research Council (CNR), and Fellow of the Marie Curie Association, the Alexander von Humboldt Foundation, and the Japan Society for the promotion of Science. He currently teaches a course on stochastic processes and nonequilibrium statistical physics at the University of Florence. He was awarded the Outreach Prize of the Italian Physical Society.