  We propose an additional term in the classical gravitational force law, which
is repelling in nature, and which may solve the dark matter problem. As an
inverse cube field interaction, it operates over 4 real spatial dimensions and
its effect on our observable 3-D space may account both for flat rotation
curves and standard Newtonian dynamics at small radial distances. By utilizing
cosmological clustering scales, we can derive the universal interaction
strength, and show that this naturally leads to an altered Planck mass that
becomes the neutron/proton rest mass. Moreover, the correct value for the
electron rest mass can be predicted using only classical electrostatics coupled
with the current theory. On cosmological scales, the interaction easily
accounts for the acceleration of the Hubble flow.
