I'm not going to pile on except to state, "Ask your Medical Doctor about Evolution. Please!".
Exactly.
It is truly a myth (or possibly a culturally motivated fabrication) that those of greater intelligence are more likely to to be atheist.
I have found in my experiences that those who are of the middle intelligence level tend to take the sciences more literally and as the intelligence scale goes up things become more relative.
There is simply no perfect man-made explanation for the infinite complexity of things.
The more you learn about science and the world around you the more you understand how little we know.