Add Yahoo as a preferred source to see more of our stories on Google. Dried hams hanging from wooden hooks in front of a stone wall - Zigmunds Dizgalvis/Getty Images Mold on food is something we ...

Mold on food is something we almost always want to avoid, but the word almost does a lot of heavy lifting in that sentence. Think about blue cheese, for instance, or soy sauce, which is fermented with ...