Hello again, forum people. I am here to show you something rather troubling, if you don't feel that the theory of evolution holds water.
Ensatina salamanders live up and down the Pacific coastline. They're what's known as a ring species. Basically, two populations of them will live side by side. They might have very slight differences, but they are largely the same, and most importantly, can interbreed. However, as you move down the coast, the differences become more and more pronounced, until the "ring" finally closes, as the salamanders farthest away cannot breed with the original salamanders. Their slight morphological differences slowly build up until the salamanders at either end constitute totally different species. This is pretty solid proof of something like evolution, I think.