Theodore Arabatzis (1965-) was born in Thessaloniki, Greece. He studied electrical engineering at Aristotle University of Thessaloniki and history and philosophy of science at Princeton University. He held a postdoctoral fellowship at MIT and a visiting fellowship at the Max Planck Institute for the History of Science. He is Professor of History and Philosophy of Science at the University of Athens. His research extends from the history of 19th and 20th century physics to issues in general philosophy of science, such as conceptual change, scientific realism, and experimentation. He is the author of "Representing Electrons: A Biographical Approach to Theoretical Entities" (University of Chicago Press, 2006), co-editor of "Kuhn’s The Structure of Scientific Revolutions Revisited" (Routledge, 2012), co-editor of "Relocating the History of Science" (Springer, 2015), and co-editor of "Big Science in the 21st Century: Economic and Societal Impacts" (IOP, 2023). He was president of the European Society for the History of Science (2020 – 2022).