Maxwell's equations are also about half an inch long. For example, Maxwell's equations say that the "four-dimensional divergence of an antisymmetric, second-rank tensor equals zero." That's Maxwell's equations, the equations for light. And in fact, at Berkeley, you can buy a T-shirt which says, "In the beginning, God said the four-dimensional divergence of an antisymmetric, second rank tensor equals zero, and there was Light, and it was good."

A lot of times it is not easy to "focus" on other then, legitmate toy models of Feynman? Anything arising from the Planck Epoch had to be understood as

**it**arose through to cosmic expression?

If you do not follow this history, you will never understand what Nima Arkani-Hamed, Sava Dimopoulos, and Gia Dvali been doing with extra dimensions. There is a conceptual feature here that I have spoken too in regards to gravity that few understand.