it's purely intuitive.
what that would mean is that our universe is being acted upon by outside forces.
i've been over this elsewhere, and don't really feel like it right now.
http://www.cnn.com/2016/09/07/opinions/dark-matter-analysis-lincoln/
the math in the big bang theory actually doesn't add up. if the big bang happened, and nothing previously existed, then we shouldn't exist either.
some kind of explosion happened - we have the cosmic radiation. we can be pretty sure of it. but, the right reading of the theory (this is highly unorthodox) is actually that it couldn't be the sole source of matter around us, that there must have been some other source of matter.
see, we've boxed ourselves into a corner with this. we seek a beginning. but, this is a religious assumption and not a scientific deduction. we are searching for something we've already decided must exist. we're not really measuring evidence and trying to determine if there was actually a beginning or not.
again: i think that if you really look at what we know carefully, and discard all extraneous assumptions, what the evidence proves is that the big bang was not the beginning of anything, and that we must be in an open universe.
this is important in context, because it opens up the possibility that these galaxies are being dragged by something outside of the observable universe - and that was already there before the big bang happened.
listen: the dark matter isn't there. it's just the recycled ether hypothesis, anyways. einstein got rid of the ether, then it snuck back in as dark matter. whether my idea is right or wrong, the ether isn't there and it's time we came to terms with it.
i just want to clarify that when i say "open universe", what i mean is that events outside of the universe can affect events within it and not something about the shape of the universe. that was sloppy.
this is where the language comes from, but it's not at all what i mean to say. i don't mean to say that some supernatural entity is pulling strings. i just mean to say that i think there's something else physically out there, and that it may not obey the physics we understand.
http://www.meta-religion.com/Philosophy/Articles/Other/causal_closure.htm