Darwin, too, noted these sorts of differences between similar kinds of animal, but unlike Aristotle used the data to come to the theory of evolution.
dˈɑːɹwɪn, tˈuː, nˈoʊɾᵻd ðiːz sˈɔːɹts ʌv dˈɪfɹənsᵻz bᵻtwˌiːn sˈɪmɪlɚ kˈaɪndz ʌv ˈænɪməl, bˌʌt ʌnlˈaɪk ˈæɹɪstˌɑːɾəl jˈuːzd ðə dˈeɪɾə tə kˈʌm tə ðə θˈiəɹi ʌv ˌɛvəlˈuːʃən.