Gravity is interesting because it pulls everything down towards the center of the mass.
If gravity is in fact a particle, then when two atoms come together, the gravitational field strength is amplified in the opposite direction of where they meet. I'll try to give a visual example:
atom 1 {O} ---> grav. pull <----- {O} atom 2
Once the atoms come together, the gravitational pull is amplified on all sides not touching.
atom 1 {{{OO}}} atom 2 .. but this time you see the field is negated on the side in which they are touching and the field doubles in strenth on all other sides.
This tells me that gravity is in fact a field. (duh right?

.. but it's these type of clues that add to the answer.
So.. with that said, we know a field exists with exacting proportions and, that the field strength is directly proportional to the amount of mass of atoms that have conglomerated.
I think this...
I think that the magnetic force is verrrry closely related to the gravitational force in behavior, but not in function. Meaning, we can't see a magnetic force.. You can't see "magnetism" flying around a magnet.. it's invisible.. so.. What is it !!!?
Same thing with gravity.. it's there, and you can't see it. I think gravity and magnetism are brothers.
No solutions here yet, just brainstorming.
- C.M.