This week, we talk tools. With precision machinist Noah Rettberg, we explore a facet of modernity as important as energy, for it is the technology that energy powers and the technology that makes that technology: machine tools. Noah draws from his professional knowledge and passion for history to takes from Roman metallurgy through the guild-protected craftsmanship of medieval Europe to the steam-powered revolution in machining to the cutting-edge of metalworking tools. Riveting!