I'm a librarian who loves anime, manga, and reading a wide variety of genres.
This is related to my post about creative AI problem-solving. This also links to a spreadsheet of fascinating/delightful/horrifying examples.
ETA - I haven't looked through the full list yet, but this one sounds like it could come straight out of some kind of horrifying sci-fi story:
"In an artificial life simulation where survival required energy but giving birth had no energy cost, one species evolved a sedentary lifestyle that consisted mostly of mating in order to produce new children which could be eaten (or used as mates to produce more edible children)."