Would be interesting to see a study of scientific principles found in literature before those principles were discovered or named, or at least without the author knowing anything about them. Saw this having come across what I think is an example of rheotaxis in Big Two-Hearted River (part one):
The river was there. It swirled against the log spiles of the bridge. Nick looked down into the clear, brown water, colored from the pebbly bottom, and watching the trout keeping themselves steady in the current with wavering fins. As he watched them they changed their positions by quick angles, only to hold steady in the fast water again […] He watched them holding themselves with their noses into the current, many trout in deep, fast moving water…”
.i`` * ^ / . . . . . ` `~ 