The Stonemaker Argument is a website with cartoons that pursue the skeptical frame of mind, and it's pretty good. The first one I saw is about cavemen and a meteorite, which they begin to worship.
I especially like the final panel. I like to remind myself sometimes that the Universe is fairly indifferent to our exhortations. People, both happily and sadly, can be influenced, though.
There are only three different pages there so far, but I hope more go up soon. This is a pretty good resource!