Refrigeration is an underrated technology. It completely transformed what billions of people eat every day. 

Today’s guest, Nicola Twilley, tells the story of refrigeration in her new book, Frostbite: How Refrigeration Changed Our Food, Our Planet, and Ourselves. Topics under discussion include: Why brewers were key drivers of refrigeration technology; the extraordinary technology inside a bag of lettuce; and why the technological frontier in food preservation may mean that we don't need to keep so much stuff so cold.