Most of them isn't all of them Darwin.
Secondly, why are you guys so damn scared to "believe" something?
It's no wonder why theists think atheists don't believe in anything. You guys seems to fight tooth and nail to avoid the word.
Most of us are not scientists and even the few that are are limited, for the most part, to the field they specialize in. That being the case few of us that accept the arguments made by scientists do so not by 100% understanding the science but because we accept the scientific methods give the best answers.
There have clearly been huge mistakes made in science and that this isn't something new -- scientists are people after all, and most current theories will, sooner or later be replaced with better theories. In most cases when a theory is changed/modified/replaced it isn't completely discarded and the predictions made by the older theory may well be nearly 100% accurate -- or not.
Ultimately unless you are a scientist in the field in question you have to take the word and calculations as they are because few of us have the knowledge or intelligence to poor over partial differential equations and the like. We take what they say because we know that there work is peer reviewed by many equally skilled scientists that would be glad to find holes in the theory.
Religious views not only don't have these checks and balances they are forbidden lest one be called a heretic.
Brian