More thoughts..
Here are some more thoughts I have had...
First, I read another article about 8 months ago about a woman physicist that was well known in the field and was a professor at some college on the East coast of the USA. She had left her position to start a company developing a material she claimed could create anti-gravity effects. Now according to the article, she was well known and very respected so she wasn't a quack. She claimed the material was some type of lattice structure that had specific atoms placed at specific points in the lattice and when she applied a current to the material anything placed above the material would float.
I haven't heard anything about her or the material since, but if magnetic fields can actually stiffen out space-time, then if this material was capable of generating a very large, confined magnetic field within it when electrical current was applied, wouldn't the magnetic field have the potential to "stiffen" space-time within the material, and thereby shield anything placed above it from the effects of gravity?
If the photon is actually massless, which has been argued recently, then maybe the photon's speed, or the speed of light, is limited by the photon's ability to transverse the "fields" of electromagnetic flux lines. In other words, maybe the flux lines of the magnetic fields that permeate the Universe are acting like an "ether" or media which is limiting the speed of the photon. Thus, if you could somehow alter the minimum spacing of flux lines, could you alter the speed of light?
Finally, if this interaction is true, then in astronomical observations we should see the effect in places like rotating neutron stars or black holes, which while rotating are generating extremely strong magnetic fields. These fields would alter the apparent gravitational effects that the objects have and make them appear to have less mass. When you think about this for a minute, doesn't that imply that mass is somehow linked to an magnetic field in some way, as Mr. G. already mentioned? I mean, if you can alter the perceived mass of an object, by reducing its gravitational effect on space-time, through the use of a magnetic field, doesn't that imply that mass, and thereby gravity, are somehow linked to magnetic fields?
Just some random thoughts I have had, take them for what you will.
Any and all replies are definitely welcome.