Charlotte Druckman
More from Charlotte Druckman
![San Francisco sourdough](https://www.popsci.com/wp-content/uploads/2019/03/26/GUCP7L47P3VRVC2WPGWKOHW3DM.jpg?w=600)
Biology
The secret to San Francisco’s famous sourdough: bug poop The secret to San Francisco’s famous sourdough: bug poop
By Charlotte Druckman
April 25, 2019
By Charlotte Druckman
April 25, 2019