I thought it was weird that Stephen Hawking wasn't mentioned at all in an article about black holes. But to be fair, I don't think we have any evidence of Hawking Radiation either.

The idea of the big bang being caused by some sort of 'white hole', is kind of cool. Here you have an object absorbing all matter, becoming infinitely dense, and at some point, it becomes so dense with matter that it actually tears a hole right through the fabric of the universe, where it then diffuses into a new reality where matter is low/non-existant. You'd have to agree that if this is possible, the 'explosion' that would occurr as the black hole diffused through the tear would be terrific. Would it be equivelent to a 'big bang'? I don't know.

Perhaps the life (or death) of a black hole varies, dependent on the available matter for the black hole to consume. A black hole that never reaches that critical amount of mass required to tear through into a new dimension (or whatever the terminology for describing the event is) is doomed to dissipate via Hawkins Radiation, however a black hole that consumes enough matter to tear such a hole, ends up disappearing anyway, as it diffuses into the newly created universe?

I have no idea, nor am I qualified in any way to have an opinion. I did read 'A Brief History of Time' once though!

Right, I had this theory as a teenager, reading popular physics. I'm sure lots of other people noticed the big bang / black hole symmetry. A pretty model should not be enough to make it significant... otoh, relativity theory was once just a pretty model too. Is their model pretty enough?

Also, any matter falling into a black hole should appear in the other universe. It would be an interesting to have new mass/energy appearing in our universe.

You are quite correct "Hawking Radiation" (entropy) completely blows this (rather fun) theory to pieces. Nice idea but does not stand up to inspection.