Some physicists have suggested that the force of gravity is much weaker than the other forces because it leaks out into hidden dimensions, so that we only feel part of its effect. I suspect the reverse may be true and that gravity originates in a higher dimension and leaks down into our reality, because if it originated here "gravitons" (theoretical particles) would be real and detectable rather than just hypothetical. Science finds it impossible to explain non-physical phenomena such as magnetic fields in physical terms. Magnetic fields are clearly not based upon physical particles because, like gravity, they exert a force even in a vacuum (where no physical particles are present), so scientists have to come up with imaginary particles like "virtual photons" to explain the phenomenon. As with gravity, I believe that magnetic forces originate in higher dimensions and only their effects can be felt in our physical dimension. Extra dimensions are the only logical way to explain all non-physical phenomena.