|Evolution of household articles, animals etc. according to Darwin's doctrine. Color lithographs by Fr. Schmidt, ca. 187-(?). Credit: Wellcome Library, London |
Evolution is not a scientific theory, but rather a belief, a doctrine, a philosophy, a worldview:
“Our theory of evolution has become . . . one which cannot be refuted by any possible observation. Every conceivable observation can be fitted into it. It is thus ‘outside of empirical science’ but not necessarily false. No one can think of ways in which to test it. Ideas either without basis or based on a few laboratory experiments carried out in extremely simplified systems have attained currency far beyond their validity. They have become part of an evolutionary dogma accepted by most of us as part of our training.” 
 Source: https://wellcomeimages.org/indexplus/image/L0064386.html. License: CC BY 4.0 (http://creativecommons.org/licenses/by/4.0/)
 L. C. Birch, P. R. Ehrlich, Evolutionary History and Population Biology, Nature 214, (22 April 1967), p. 352.