Lovely.

Each of us builds, inside our head, a model of the world in which we find ourselves. The minimal model of the world is the model our ancestors needed in order to survive in it. The simulation software was constructed and debugged by natural selection, and it is most adept in the world familiar to our ancestors on the African savannah: A three-dimensional world of medium sized material objects, moving at speeds relative to one another. As an unexpected bonus, our brains turn out to be powerful enough accommodate a much richer world model than the mediocre utilitarian one that our ancestors needed in order to survive. Art and science are runaway manifestations of this bonus.
-Richard Dawkins, The God Delusion