The episode examines the United States’ long-standing status as a global holdout regarding the adoption of the metric system. It traces the history of measurement from ancient, body-derived customary units to the Enlightenment-era rationalization of the decimal-based International System of Units. The podcast highlights a striking contradiction where the U.S. uses metric standards for science, medicine, and international trade, while the general public remains tethered to miles, pounds, and Fahrenheit. This dual-system environment has led to costly and tragic errors, such as the loss of the Mars Climate Orbiter and dangerous medical dosing mistakes. Ultimately, the episode argues that the failure ...