If the germ theory is relatively new, how do they think fermentation was happening (like wine, ale, yogurt etc.) thousands of years ago?

Question

If the germ theory is relatively new, how do they think fermentation was happening (like wine, ale, yogurt etc.) thousands of years ago?

In: 613

Answer 1

they thought it was something certain material did spontaneously. which, without sterilization, is close enough to true. yeast exists naturally on nearly all food.