I'm with Elof.
I find it more plausible to have a scientific explanation to things, simply because there's evidence of it.
If we take the Christian route, what do we have? Genesis, in the Old Testament. Keep in mind that other religions have alternate creation stories, so who do you believe? The one with more evidence than some words in a book.
Before you get all hyped up and whatnot, I'm actually a Catholic (retired, though) so I've been brought up on all this junk. I have a vantage point compared to those who've been brought up athiest: I've experienced both sides of the "debate" and I made a choice based on my experiences.
While I cannot deny the good that Religion does (various aid missions and whatnot, the comfort given to older people in relation to the mystery of death), I can't ignore the fact that Religion has caused an ambundance of problems, both in the past and in our current world. Our world has been shaped by the issues of Religion: take Australia, for instance. Thanks to some Religion (as much as politicians wish to deny it), stuff like stem cell research is only now being discussed as a viable thing, and something as trivial as gay marriage is outlawed here. I mean, seriously, wtf?
I think that if we live by morals, which aren't intrinsically religious, then we should be fine. Religions adapt morals for their own needs (and it most cases, change them). Abiding by morals of respect for others, peace, understanding and love should be more than enough to live our lives in. I must stress the fact that these morals are not religious: they're common to everyone, regardless of what you believe in. There's a clear distinction between what you believe in and what you follow, which is something that many people cannot see.