One of the theories under the umbrella of "The Theory of Evolution" is that all living things today evolved from a common ancestor. If this turns out to be true I think it would be strong evidence pointing to the existence of a creator. I don't see the logic in this theory if we are to assume life started and evolved according to the mechanics of nature.
Nature tends to do things in a big way. When conditions are right for a snow storm it will produce billions of snow flakes. Why would we assume that if conditons were right for the formation of life on earth there would only be one species of microscopic creaures appearing at only one point on the planet at only one point in time in the history of the planet? Wouldn't it be far more likely that billions of creatures were produced over some unkown length of time? If 99% of those creatures died that would still leave millions to evolve, and I see no reason to believe they would have all evolved in exactly the same way. In a relatively short time many more species would evolve. Some would disappear, but others would survive and start multiple lines of evolution.
We have this image of evolution in the form of a tree with a single trunk supporting all the branches of life but, in reality, isn't it far more likely that there were many trunks? And even the branches would be multiple lines of evolution in the same manner as the trunks.
The common ancestor would be the "trunk" of the tree of evolution, however, I believe if it was left up to nature there would not have been just a single tree, but a forest.