Harley Wilhelm, an unsung hero of the Manhattan Project, shares his groundbreaking work in revolutionizing pure uranium metal production. He discusses the Ames Process that transformed slow metal smelting into a vital operation for ending World War II. The conversation dives into the intricate science of uranium enrichment and the unexpected connections in rare earth research. Wilhelm also highlights the challenges of maintaining secrecy during wartime collaboration and details the surprising uses and health implications of depleted uranium.