Science of God
Some time back, there was a story in Slashdot science section which dealt with "Human beings believing in God was necessary for adaptation, survival and reproduction". This was a study of genetic theory about how humans came to believe in God. One of the scientists got curious at the fact (which surprised me too) that "started looking at history, and I wondered why no society ever survived more than three generations without a religious foundation as its raison d'être."
The article details that humans are hardwired to believe in god, it has supported the survival of the race and various different theories of existence and normal human understanding. It also gives account of how atheists view the fact and they have to work hard to get the details rather than just leaving it unexplained.
The slashdot story as usual was interesting.