Francesco Guerra is Emeritus Professor of Theoretical Physics in the Department of Physics at the University of Rome "La Sapienza", and associated to the Italian National Institute for Nuclear Physics and the Enrico Fermi Research Center in Rome. His research activity includes quantum field theory, elementary particle physics, statistical mechanics of complex systems, and the history of nuclear physics. He has published around two hundred scientific papers, as well as books and monographs. In 2008 he received the Prize for History of Physics from the Italian Physical Society. He is managing editor of the European Physical Journal H (EPJ-H), which is devoted to historical perspectives in contemporary physics. Nadia Robotti is Full Professor of the History of Physics in the Department of Physics at the University of Genoa, and associated to the Italian National Institute for Nuclear Physics and the Enrico Fermi Research Center in Rome. Her research activity includes the history of quantum mechanics and atomic and nuclear physics. She has published around 150 research articles, as well as books and monographs. In 2008 she received the Prize for History of Physics from the Italian Physical Society. She is vice-director of the Giornale di Fisica and a member of the International Academy of the History of Science.