Opposite Worlds

No. Atomic forces such as the Strong Force act only over short distances, but with great force. Gravity is the opposite. It acts over infinite distance, but its effect is weak.

Atomic forces can not be responsible for the gravity as the distance they operate over is too short.

The leading candidate for dark matter are WIMPs.

I am not sure exactly what you mean by opposite universes unless you are talking about a universe where everyone wears a goatee. There are many theories about alternate universes, multiverses, brane worlds, etc., but opposite particles is such a vague definition that it could mean just about anything.

Like Maynard and Dobie?

Wasn't that filled in the Recombination epoch of the early universe?

Whatever it is that you're drinking, can I have a pint?

A couple of glasses of port, I think I must have had an extra one when I dreamt this one up.

Regards JD.

The closest thing to what you are talking about might be a universe made of antimatter. Antiprotons have a negative charge vs a positive charge for protons. Likewise antielectrons or positrons have the opposite charge of electrons. But still in this antiuniverse, antielectrons attract antiprotons and repel other antielectrons, and antiprotons repel each other.

There are an infinite number of universes existing simultaneously in the same space but in an infinite number of time domains. What we observe as dark matter and dark energy really exist as normal matter and energy in those alternate universes with side band frequencies that are equal to our universe's 5th and 11th harmonic of time. This interrelationship holds true for all universes, and as such no two universes are ever parallel. Unlimited space travel as we dream of it, leverages this relationship and can be realized by the controlled use of the semi-stable element 212. In this practice there can be an infinite number of shifts to these harmonic universes and back. Essentially this is the speeding up and slowing down of time by way of harmonic universes, but never going back. The failure to properly control 212 can spawn yet another random time domain, or big bang. At this point travelers would be off the map and forever lost. Don't ask me how I know.

"The failure to properly control 212 can spawn yet another random time domain, or big bang. At this point travelers would be off the map and forever lost."

Considering the temperature at the start of the big bang was about 10^32 Kelvins I would say that being lost is a wee bit of an understatement.