Out of the blue, a man talking about blue cheese and caves! Interesting enough on its own to maybe tune in and listen. Then, he mentions that magic word for me, “humidity”. Roquefort cheese from the Aveyron region in France is matured in a cave. And there is a very long history of the cheese makers in this region using the steady temperature and humidity conditions of the caves. But equally as fascinating for me is that the caves were also the original source of the fungus that gives the cheese its blue streaks.…