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

How exactly is a rainbow made? How exactly does a sun set? How exactly does a posi-trac rear end on a Plymouth work? It just does.