WHAT'S IN YOUR FOOD?
'(<a href="http://www.j-archive.com/media/2007-06-15_J_11.jpg" target="_blank">Sarah of the Clue Crew bakes up the next clue from the Boudin Bakery in San Francisco, CA</a>) San Francisco's sourdough bread gets its unique flavor from a combination of wild yeast and lactobasillus, one of these which thrive in the foggy climate'
a bacterium