Audio recording of session C40 of the March 2017 annual meeting of the American Physical Society, held in New Orleans, Louisiana in March 2017. This session was chaired by Robert Crease, Stony Brook University. Talks (and speakers) include: "Abraham Pais Prize Lecture: Shifting Problems and Boundaries in the History of Modern Physics" (Mary-Jo Nye); "Is Seeing Believing? Direct and Indirect Obervation in Physics" (Allan Franklin); "The metamorphoses of relativity" (Richard Staley); "A resolution to the historians disagreement over Planck's introduction of the quantum hypothesis" (Michael Nauenberg); "From the Old to the New World of Nuclear Physics" (Roger H. Stuewer). Topics discussed include history of science, Nobel Prize, LIGO, gravitational waves, observations, neutrino, positron, Higgs boson, relativity, relational physics, nuclear physics, Ernest Rutherford, George Gamow, Irene Curie, Frederic Joliot, Wolfgang Pauli, Enrico Fermi, Niels Bohr, Gregory Breit, and Eugene Wigner.