Science is merely a set of tools and processes, nothing more. Seriously, NOTHING more. If, as GP says, you are taking it on faith that some "scientific conclusion" is true, you're merely deferring expertise on the matter. Much like when your tech support guy says your hard drive is shot and you need to replace it, you just trust that he's more likely right than not, and take his advice. If you didn't want to believe him, you could go back to school to learn everything there is to know in the field and find out for yourself whether or not your hard drive is salvageable. You may even come to a different conclusion!
With Religion, there is nothing you can do to understand it. You can only "have faith". If your spiritual leader or holy book tells you the world is a certain way, you can only believe it, or disbelieve it, you cannot do anything to investigate the veracity of those claims. Truly, this is the most authoritarian of world views: Believe this because I tell you to!