Historian Brad Harris reveals what empowered us to wield cold.  While most of the achievements of technology seem based on our conquest of heat, the unsung technological hero of modernity is refrigeration. It’s on-demand cold is critical in preserving the unprecedented cornucopia of foods we eat.  But refrigeration does so much more... How It Began is supported by CuriosityStream!  Check them out at curiositystream.com/howitbegan. For more information on this episode, visit howitbegan.com.