Watch Modern Marvels online: Episode 21 Cheese

From the giant cheese factories of Wisconsin to the goat farms of Northern California, Modern Marvels "Cheese" reveals how this amazing commodity (whether sliced from a pungent, moldy block, or sprayed from a can) is made. We'll look at the ancient techniques, and cutting-edge technologies, behind some of the world's most legendary cheeses, including cheddar, blue, mozzarella, Parmesan, Limburger, brie, cream cheese, and American cheese. We'll taste history from the Roman Empire's use of hard cheeses to feed its soldiers, to medieval monks' cultivation of stinky cheeses and strong beer, the 20th Century's embrace of creamy-smooth "process cheese". And yes, we'll answer that eternal question, "Why does Swiss cheese have holes?"

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