Obviously evidence can't prove anything in the sense of a geometrical proof. It can show "proof beyond a reasonable doubt", however.
Here's an interesting and amusing website, Some More of God's Greatest Mistakes. Rather than showing the evidence for evolution, it shows a bit of the evidence against intelligent design. Learn about the recurrent laryngeal nerve, then come back and explain why the hypothetical designer was allowed to keep its engineering license!
So, a lack of Human understanding of why certain structures are made the way they are is evidence that ID does not exist. Because man (woman) cannot explain these seemingly bizare structures, then God cannot exist. Hmmmmm. Interesting theory. Still doesn't exactly provide any direct evidence of evolution, though, does it?