Alert to creationists / intelligent design proponents
However, when it comes down to it, the whole argument against creationism / intelligent design and against teaching it in the school as "science" boils down to:
Just because something has not (yet) been explained does not mean that a god is responsible.
The "god of the gaps" has throughout history been called upon to explain many things that humanity could not explain at the time (the most immediate thing that comes to mind is the explanation for how the planets go round the sun). Those gaps have been continually been getting smaller and smaller as we've understood the universe better and better. Once you abandon "natural" explanations for phenomena, you have abandoned science.
Now the intelligent design folks say that certain aspects biology can not be explained through any evolutionary mechanism, therefore a designer must have done it. To this I say:
The Universe is smarter than you.
Of course the question of who designed the designer is not even considered, because the designer must have always existed, but the question of whether the universe universe may have always existed is ridiculous...
Don't even get me started on those Jehovah-apologists who said that the tsunami a few months ago which killed hundreds of thousands of people was actually a good thing, because god made it happen, and god has a plan, and he was showing humanity blah blah blah...
Ok, I got a little random there towards the end. So sue me.