Very interesting thoughts.

I liked Hector's idea. He doesn't like the concept of time as a dimension and sees time as developing (I like that word- in 4-D) in response to energy density changes.

Actually, since time meets the dictionary definition of a dimension, I think it is, but like energy, in its essence, it and even space may be non-dimensional. The key is this "momentum" thing. What makes a universe a universe is "differences" in some qualities from one "location" to another.

To me the interesting thing about GR is that it works! It is, from just above the planck length upward, a verified reality. The fact that the universe acts perfectly geometric, and can be described in a geometric way, means that momentum can change dimensionless nothing cosmologically into the reality we observe.

Quantum Mechanics at planck scale, will, I believe prove to be a dimensional, frame of reference issue in science...a way of describing what we observe from OUR frame.

Antigravity? In a dual universe, I can't see repulsive gravity in the sense we understand that term from our side of reality. If we live in a dual universe, and if there are really two of everything, inversely mapped and cosmologically separated in time, but superimposed in energy and space, all we have to do is look at ourselves. We are not going anywhere. The Atmosphere of the earth is not going anywhere...obviously gravity in both universe and antiverse HAVE to pull "down".

Yet dropped items in an antiverse would defy gravity and leap into our hands and meteors would unburn in the atmosphere. Gradually the Earth WOULD change. This scenario is consistent with the idea that gravity is not a true force, but a fictitious force- an acceleration.

I believe the reason why gravity seems so weak is that we only observe half of it. To understand the rotational characteristics of the galaxies, we need to double the mass of the cosmos, double the strength of gravity, and add the mass of gravitational scalar in all space to get the correct mass of the universe we actually can observe with our telescopes.

Best Wishes! Sam Cox