Bad Theory as a Bad Tragedy

A quote from Bas C Van Fraassen, Scientific Representation: Paradoxes of Perspective:

p. 266 ‘Aristotle himself seems to see the parallelism very well. When in the Physics he comes to what he considers a bad theory (the theory of evolution by natural selection and chance variation, as it happens!) he make fun of it. It does not meet his standard for scientific knowledge, for it does not “deal adequately with the ‘why’ … in terms of each type of explanatory factor.” And he emphasizes that again in Metaphysics: “But the phenomena show that nature is not a series of episodes, like a bad tragedy.”‘