I think the current theories put gravity as an effect of the higher dimensions on our 4 dimesional world. I like to think we live in the highest 4 dimensions, and we see the lower dimesions as gravity, electomagnetism, expansion of space, intention, gestalt, etc. because I don't think you can get space-time without the other dimensions being first. See string theory in Wikipedia. ~Sam

Pyrolysis creates reduced carbon! ...Time for the next step in our evolutionary symbiosis with fire.