(Sorry, couldn't resist the title)
An article on Physics Today brings news that there is a new record for largest black hole (not) seen in space, some 300 million light-years away. It hints at something in the last sentence:
Also, because of their unusually large mass, they may have evolved differently from smaller black holes.
Could a significant proportion of the mass of the universe be bound up in primordial black holes, which are still moving away from each other with their incredible momenta, warping spacetime as they go?
I can't quite square this with the near-universal red-shift, however; if it was the action of black holes dragging us away from other galaxies, we would see some galaxies drawn towards these black holes with blue-shift instead.
And yet... the peculiarities of spacetime around black holes could account for hyperinflation, couldn't they? If the universe began as one or many black holes, then there would need to be some sort of abnormal physics going on to separate them in the first place.
The joys of ignorance.
Thinking about CMB, there would be some sign in that that there were these black holes, unless they were so numerous that the distribution was nearly uniform.
What do you think?