I have been thinking about the dark energy problem of the expanding universe recently to see if the conjecture of the "magnetic monopole tachyonic neutrinos" can solve the problem.
If there is an unaccounted energy in the universe, it could be the repulsive potential energy from the magnetic monopole tachyonic neutrinos. While they travel faster than the speed of light, that doesn't mean that they are immune from the repulsive magnetic force among themselves. It will be like compressed gas in the atmospheric environment. The original reason for the introduction of magnetic monopole tachyonic neutrinos was because it solves the problem of the charge asymmetry in the Maxwell's equation. That is the missing isolated magnetic charge in otherwise very symmetric equation. The nature always tries to preserve symmetry while it is broken in very mysterious ways.
As soon as we introduce the magnetic monopole tachyonic neutrinos, we have the problem of why it has only one majority type of magnetic charges either it may be north or south pole magnets. The wishful symmetry is broken again by it's none equal magnetic charges present unlike the case of electric charges. But even in the case of electric charges, the positive charge always appears in the form of positive ions by the number of proton, not by positrons.
The unexpected result of the inductive conjecture of the magnetic monopole tahcyonic neutrinos was that suddenly the space becomes electrically neutralized bubble soup where even a tiny bit of disturbance in local space will be propagated with enormous speed in the form of electromagnetic waves. So the space is not empty at all as the Einstein's original conjecture of relativity predicted.
The interesting possibility is that these tachyonic neutrinos may also be the cause of the quantum mechanical phenomenon as I already explained in detail in my book "Physics of the New Millennium, Birth of the New Paradigm".
In most of the cases, nature likes to have as fewer assumptions as possible which is called Occam's razor. The more assumptions you need to explain the same phenomenon, the more likely the theory could be wrong.
In terms of catching birds with one stone, the idea of magnetic monopole tachyonic neutrinos can not be beaten. The enigma of the light traveling the empty space was horrendously unphysical. Quantum mechanical stochastic uncertainty was another serious dilemma for quantum physicists.
Now it seems like it is going to offer an easy and dandy solution for the dark energy problem as well. The repulsive magnetic potential energy among the magnetic monopole neutrinos can be the perfect solution. The universe is bound to expand in this picture.
But the unexpected problem is that the density of the neutrinos will decrease as the universe keeps expanding and it will fundamentally affect the speed of light travel and also the quantum mechanical effect as well. As the effect of the magnetic monopole weakens due to the diminished density, it will shrink the average size of the atoms in the universe and will also make the speed of light travel slower as there will be less rigidity of the electric field in the space. But then there is always the new creation of neutrinos from the beta decay of the neutrons in the universe.
The combined effects may cause many unexpected consequences that may be very hard to predict since everything is related to each other one way or another. .
But for now, at least, it looks like the missing dark energy problem is solved, which may only be the beginning of the unraveling the mysteries of the universe.