In my opinion there are too many flaws in Christianity to take it seriously. It's the biggest practical joke of the last two millennia, but I'm not laughing.
As for science:
That. At least, that's what the running theory(ies) is. Not to say that it's right; it probably isn't.
Humans have a tendency to cling to definitions and then settle down. In the case of science, what is perceived as fact is taught to be absolutely unquestionable. In this way science is akin to the teachings of religions. I believe any lack of thought such as that is ignorance in its finest. The bottom line is that we are not even a tiny speck in the scale of whatever it is that we exist in: we are naive. Thus it is reasonable to assume that much of what we know, however diligently researched, can and may very well be wrong. We are very much isolated to this planet, for now.
Specifically speaking on the creation of the universe, I honestly believe that whatever truth there is that is relevant to such a subject is beyond human conception. Well, at least the way we are now (and presumably will be until our species goes extinct).