Argonne National Laboratory is a science and engineering research national laboratory operated by the University of Chicago Argonne LLC for the United States Department of Energy. It is located in Lemont, Illinois, outside of Chicago. Argonne conducts research in a variety of fields, including energy, environment, national security, and technology. The laboratory was founded in 1946 as part of the Manhattan Project and has since become one of the largest science and engineering research laboratories in the United States.