I don’t think it needs to. Science and religion are completely different things. While science focuses on hard facts and the development if ideas, religion is based on ideas that are centuries and millenia old. Religion gives people faith, and hope, and something that they can turn to in times of celebration or great need. Everyone needs faith in something, whether it be religion, or your parents, or the desire to never upset your grandparents, and I think that they serve completely different purposes in people’s lives.
Do you think that religion could ever be replaced? If, as in your recent question, an asteroid was due to hit Earth, people would turn to science to fix it, but I think that a lot of people would turn to religion too. They’re different, but very important to different people.
I agree with Suze, they are pretty much different things. However I see what you’re getting at. As our society as a whole gains more understanding of science and what it tells us about the world there does seem to have been a shift to more rational thinking, so secularism. However I imagine that when most people are on their death beds they will still ponder if there is a supreme being and what will happen to them afterwards. I think religion is partially built in to our species and I don’t think it’ll ever disappear.