Scientists have explored the relationship between intelligence and religiosity, as well as between education level attained and religiosity for many decades (see the following article that summarizes some of the relevant research). Unfortunately, for religious folks, the news is not good. IQ and religiosity are negatively correlated, at both the individual as well as national levels. Religiosity and educational attainment are also negatively correlated. Amongst the educated classes, professors are the least likely to be religious, and finally within the academe, the more eminent the professor is, the less he/she is likely to be religious. The evidence could not be any clearer. Please bear in mind that providing an instance wherein your uncle Joe is a physicist who is also a devout Christian does not falsify the latter evidence (see my previous post on using singular exemplars to attempt to falsify phenomena that hold true at the population level).
Very interesting post on the Psychology Today blog about the religiosity of intelligent folks. The basic premise of the post is that the more intelligent one is, the less likely he/she is to believe in God. Read the whole thing, but in case you don't it includes a wonderful quote:
The bottom line is that God is striking the following deal with us: "If you truly believe in me, I command you to refrain from using the brain that I have given you. Accept me by rejecting your brain."