Let’s be careful to remember the limitations on the claim, “God doesn’t exist.” Science is always provisional. Any claim could be wrong—from matter being made of atoms to disease being caused by germs. As Austin Cline said in “Scientifically, God Does Not Exist,” (http://atheism.about.com/od/argumentsagainstgod/a/GodScience.htm) a scientific statement “X doesn’t exist” is shorthand for the more precise statement:
This alleged entity has no place in any scientific equations, plays no role in any scientific explanations, cannot be used to predict any events, does not describe any thing or force that has yet been detected, and there are no models of the universe in which its presence is either required, productive, or useful.
(Extract from the excellent http://crossexaminedblog.com/2012/06/21/god-is-nonexistent/ by Bob Seidensticker author of the book Cross Examined http://www.amazon.com/gp/product/1468011332/ref=as_li_tf_tl?ie=UTF8&tag=galiluncha-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=1468011332)