David Tong is a professor of theoretical physics at the University of Cambridge whose research focuses primarily on quantum field theory and its applications to diverse areas, including particle physics, gravity, string theory, cosmology, condensed matter physics, and geometry. He holds a Simons Investigator appointment and has received, among others, the Adams Prize and the Royal Society Wolfson Research Merit Award. The author of the recently published Lectures on Theoretical Physics textbook series from Cambridge University Press, Tong is a prolific science communicator who brings physics to life through humor, history, vivid metaphor, and a keen appreciation of the felicities (and absurdities) of his field. He lives in Cambridge, UK.