DNA shows the fundamental similarities between species, but DNA does not show evolution. Nor does it suggest evolution. At best, the discovery of DNA simply doesn't rule out evolution as a possibility. Isn't it just as likely that the life on our planet was created by a less than perfect alien race over the course of many experimental years? The similarity of DNA could likely be indicative of a sort of object-oriented, reusable programming language for life. That's a possibility. But the important thing is not who created the theory, but who is currently pushing the theory. Again, isn't it possible that the effects of natural selection were intentionally built into our DNA code in order for life to survive in a changing environment? The similarities of different species is not evidence of evolution.