Am completely new to this, and could only classify myself as a layman in physics terms, but an interesting thought occurred to me recently:
While watching " Cosmos" recently, I started thinking about what was said about the expansion of the universe. If we take as a given that at the centre of each galaxy is a supermassive black hole which is consuming matter and growing as a result of this, why would our galaxy still be expanding? So what if all the matter that is being absorbed by the black hole is being turned from matter into 'dark matter'? The black hole might be an instrument which takes in matter spewing out dark matter, which would be amassing and pressing down on our galaxy. This would explain why our galaxy is expanding faster, the pressure from all the dark matter building up is squeezing the galaxy and therefore the outskirts would be moving faster. This could also help explain our alleged perception that time is moving faster than it used to, time is moving faster because matter is moving faster through the universe. And it could help explain the amount of dark matter in the galaxy.
All this is but a theory, I have no mathematical skills whatsoever, so I can't do the maths, but anyone who could put this into an equation (or similar) is welcome to use this as a basis...
Would be interested to hear whether anyone thinks this theory might be plausible, or whether it is complete poppycock...
Norman Jones