It's pink, pliable, and so uniformly unperturbed it seems as though it must have come from a single, endless sausage. In lunchboxes, it's folded into sandwiches with yellow mustard. In diners, bologna ...

You've eaten the stuff since you were a kid, but do you actually know where bologna comes from? Is it beef? Is it pork? Actually, the answer is pretty complicated, but bologna originates with the ...