During the 20th century, Tennessee would transition from an agrarian economy based on tobacco and cotton, to a more diversified economy. This was aided in part by massive federal investment in the Tennessee Valley Authority, which provided cheap electricity for the state. The huge electricity supply made possible the establishment of the city of Oak Ridge to house the Manhattan Project's uranium enrichment facilities, helping to build the world's first atomic bombs. In 2016, the element tennessine was named for the state, largely in recognition of the roles played by Oak Ridge, Vanderbilt University, and the University of Tennessee in the element’s discovery.