(See moving magnet and conductor problem for details about the thought experiment that eventually helped Albert Einstein to develop special relativity.)
The Wiki article doesn't specifically say if electric/magnetic fields are in spacetime, but they were apparently important in the development of S R from which spacetime emerged, so a layperson might be forgiven for assuming that fields exist in spacetime.
I read the photon article, I think I have a general grasp of that, but I still have trouble creating a "visual" image of somewhere that is outside spacetime.
I liked Vongehr's article, but as far as the division is concerned I shall stay comfortably on the fence, with at least one foot in the "nutty nuts' camp".
The question then becomes is Energy real or is it a consequence of the above?
Eureka! At last I think I have grasped why you have been asking whether or not energy is real. I think I shall go and make a round of tea, think about this a bit and, hopefully, come back later.
