A deficiency of blogging is that subsequent posts supersede the originals. I use this blog as a Pensieve so I don’t modify posts. Instead I have adopted the convention of revisited in the title.
The prosaic explanation of dark matter is that it is composed of Neutrinos. I am a fan of the prosaic. Whatever it is there has to be a lot of it. It has to have mass. I believe it has to propagate light. Does it have the sole property of propagation? Does it propagate in cooperation with other materials? Does it only show this ability in vacuum?
Since light bends in gravity I am unable to think of a distinction between inert photons, static neutrinos and current theories. Can we create, however faint, the laser affect within vacuum? If the ether material lases it should maximize at specific frequencies, identifying the particles.
Christine suggested dissipated gravity waves as an explanation of the chatter.