Dark matter and space-time are to humans like the ocean is to fish.... the fish aren't aware of the "substance" they swim in and thus have no way to discern it and separate it from their reality.
[ img width=250]http://i.giphy.com/media/EldfH1VJdbrwY/giphy.gif[/img]
Is this a quote from our fellow bitcoiner Vegas Luna?
Fish are unaware of most things. They are fish.
Humans, on the other hand, are very aware of dark matter and space-time.
I believe you yourself wrote something about dark matter and space-time in the very post I am responding to.