How did people figure out how to make yogurt?

There are all different kinds of yogurt: Greek, vanilla bean, blueberry, even sheep’s milk yogurt! But how did people first figure out how to make this yummy food? We asked journalist Allison Conroe to help us find the answer. Got a question that’s whey cool? Send it to us at BrainsOn.org/contact, and we’ll find a legen-dairy answer.