I know you couldn't sleep last night because you were wondering what in the HECK spin networks are. OK, lets face it, this whole quantum crap bores the heck out of you. Too bad. To define a spin network, lets have some more imagery here. Picture in your mind a cube. Now at the center of the cube is a dot. For this example (as well as many others) lets call this dot, a node. This node represents the volume of the cube. So lets give the node a number which correspond to the cube's volume. Next lets draw lines from the node to each side of the cube. You should now have a dot with 6 lines coming out of it. These lines will also have numbers associated with them. Only these numbers will represent the area of that side of the cube. Ta daaa! You now have a representation of a quantum volume. Now, make that cube a volume of space the size of one Plant volume, and you have one quantum of volume. If you want to network this volume with another quantum of volume, you draw a line connecting the two nodes that would represent the sides of the two volumes that are touching. If you really wanted to, you could draw a spin network for the entire universe. You would only need about 10¹⁸⁴ nodes on your diagram. You may need a few pieces of paper to map that one out. Now, add a third dimension to this network (the lines become planes and the nodes become lines) and you have just added Time to your spin network. Now, by jumping down the time axis by the Plank Time, you can see how volumes will react with other volumes through the course of time. This is it. From this spin network, you can see how space and time and be affected by other space through time. It's quite fascinating really. Well, I think anyway.