The secret to San Francisco's famous sourdough: bug poop
![](https://www.popsci.com/sites/popsci.com/files/styles/1000_16x9/public/images/2019/03/psc-sourdough-bread-rolls.jpg?itok=cbrjaZAl)
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Meet the wee, multilegged chefs behind the world's most sought-after loaves.
Meet the wee, multilegged chefs behind the world's most sought-after loaves.
via Popular Science "http://bit.ly/2GFgOsO"
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