Mary Bell is a physicist and the widow of John Bell, with whom she frequently collaborated. She held several positions working on particle acceleration design, notably with the Atomic Energy Research Establishment in Harwell, Oxfordshire, and several accelerator divisions at CERN.
Shan Gao is an Associate Professor at the Institute for the History of Natural Sciences, Chinese Academy of Sciences. He is the founder and managing editor of the International Journal of Quantum Foundations. He is the author of several books and the editor of the recent anthology Protective Measurement and Quantum Reality: Towards a New Understanding of Quantum Mechanics (Cambridge, 2015). His research focuses on the foundations of quantum mechanics and the history of modern physics.