He studies galaxy formation using cosmological hydrodynamical simulations, leading a project called FIRE ("Feedback In Realistic Environments") that develops new simulations which incorporate detailed models of stellar evolution to study the impact of processes such as supernova explosions on the large-scale evolution of galaxies. Professor Faucher-Giguère's simulations follow the formation and evolution of galaxies from the Big Bang to present, and are used to make predictions for observations by state-of-the-art telescopes on the ground and in space.