On this episode of The Sourdough Podcast, Karl de Smedt joins me to talk about the THE PURATOS WORLD HERITAGE SOURDOUGH LIBRARY. We discuss the history and science behind sourdough bread as well as some of the unique stories behind the library’s sourdough collection. Karl tells us how the concept for the world’s only sourdough library came to fruition and how you can add your own sourdough starter to the growing worldwide database and help preserve sourdough biodiversity and our shared sourdough heritage.