Re: The Big Bang Blackhole?
"If the big bang was a fast ejection of matter from a black hole that was many trillions the size of this one, and the rate of ejection is in some way proportional to its size, isn't it feasible that this black hole would still exist today, and just be a hell of a lot smaller?"
Nice idea, but no. In actual fact, the energy radiated by a black hole is inversely proportional to its size. While a black hole of the mass of, say, a mountain would probably shine brightly (if such primordial black holes even exist,) a huge one such as the one in this article would hardly emit any energy at all. I haven't done the sums (and the maths is probably beyond me) but I'm pretty sure that even a stellar-mass black hole that has existed for the entire age of the universe would not have shrunk appreciably. In fact it'll have grown due to swallowing up various particles that have come its way.