The more we study the human body, the more questions we get. I wonder if some future Dr. McCoy centuries from now will we us as we do medicine of two centuries ago. We can go to other planets and invent new tech every day, but the body still holds a ton of mysteries.
I think we often forget that each generation always thinks they are at the peak of technology except for what they are yet to discover or solve. That is of course completely tautological, but there is a point hidden in there! For instance people in a pre-germ era were not in constant reflection on the inadequacy of e.g. miasma theory. Instead miasma theory was taken as an assumption and so things it failed to explain…
Well, about that -
https://www.livescience.com/61444-black-death-cause-found-tr...