It is inconceivable that inanimate Matter should, without the Mediation of something else, which is not material, operate upon, and affect other matter without mutual Contact…That Gravity should be innate, inherent and essential to Matter, so that one body may act upon another at a distance thro' a Vacuum, without the Mediation of any thing else, by and through which their Action and Force may be conveyed from one to another, is to me so great an Absurdity that I believe no Man who has in philosophical Matters a competent Faculty of thinking can ever fall into it. Gravity must be caused by an Agent acting constantly . .. ; (Newton Letters to Bently 1692-3)
That Agent/Medium acting constantly is of course also the unique 3D physical medium of light phenomenon: our supposed twined threads consistent with Schrodinger's wavefunction and described by c squared in Newton's gravitational equation and Einstein's relativity equation. All the atoms of the U are interconnected by a twined entity: one to all others. The ying thread and the yang thread, the x & the y, the E & the M are intrinsically tied to all atoms of the Universe. In supposition they converge upon all atoms and fork out at the atomic perimeter to form the magnetic electron skin and the electric proton star. The protons at the edge of the U are configured a little differently.
Light is torsion of 'medium' and gravity is tension of one and the same 'medium'.
The EM Ropes torque in two directions: to and from every atom of the Universe. Atoms pump. As they pump, they reel in (in expansion) or release (in contraction) links of EM Rope.
Gravity generates strength by number of tensions multiplied when the distance between any two objects comprised of two or more atoms decreases. As distance decreases, more and more atoms tug on one another at increasingly steep angles via the EM Ropes that connects all atoms.