Whatever science can't answer, spirituality can. That's my belief system compacted into one sentence.
The long version is that I believe science is the only answer to this question based in reality, but science can't answer everything. Because certain things have yet to be known, I turn to spirituality as a satisfying answer to the unknown. I think it's a very human thing to do. I'm not the type to completely go all in one way or the other. If I had to pick one, I'd pick science because that's tangible, visible and provable.