Mmm, I gotta disagree a bit on that Bronk. Most athiests I've met tend to believe pretty firmly in science and mathematics.
It's the entire idea of "burden of proof". If you believe in an idea, prove it. It's that simple. You can prove n+1=3 therfore n=2. You can prove neo-darwinism by looking at fossils, genetics, iteration studies, or macroevolution in process (hawthorn fly). In fact, there's even a computer software suite that designs objects by generating hundreds of permutations, tests them, and mashes the best traits together with code-based natural selection. Creates a new generation based on that and repeats. The nickname for it is the "idea machine". It's faster, more effecient, and gets better results than human engineers. It holds 3 patents.
If you choose to have faith in something, more power to you. I'm a skeptic at heart. I simply want information to be provable in repeated experimentation & peer review. Then, it becomes more than faith, more than an idea... it's fact. If you want to say, well, God invented natural selection. Okay, maybe he did, maybe he didn't. It's up to you to prove that he did, in a fashion repeatable by others.