First an apology as I posted this under philosophy - an honest mistake

I've been thinking about Prof Kaku's version of the parallel universe
theory. His version basically says that "baby" universes form on the
surface of our universe under black-hole scale concentrations of mass,
and eventually they tear off completely, severing the "umbilical cord"
that is a black hole in a parent universe, feeding a a white hole in the
fledgling universe, which is simply spewing out matter and energy (this
is no different from them big bang our universe experienced) So, for
every black hole forms in our universe, it spawns a big bang that grows
into a child universe... matter and energy keep getting funneled into
this black hole, and out into this parallel universe big-bang event and
eventually when it's had enough it disconnects itself.

I'm not sure if I like this...

First of all, it means that there is hard-limit on the amount of times
this can happen. There is a limit to how many generations of universe
can be "born" as all the matter and energy gets siphoned off the higher
generations into lower ones, eventually a universe will be either be
born without enough stuff to form it's own black hold and "give birth"
or, perhaps it won't be able to absorb enough matter/energy from it's
parent to actually disconnect itself, at which point it's a wart on the
surface of ours... what would this be like? Two universes joined by a
black-hole, matter and energy being bounced between them and generally
making universal heat-death for both twice as fast as it should have
been? Or maybe it'll just absorb it's parent altogether and conserve
matter/energy that way... You now have universe full of matter that
periodically squeezes itself through a black hole. It's the same
universe just giving rise to itself over and over again... a totally
stubby universe?

You can get around all this by adding a "fountain of stuff" to our
current universe, a "white hole" he called it, but the existence of such
a thing would simply mean that we've not yet cut the umbilical cord from
our parent. Perhaps there is a "queen universe" at the top of it all,
that is being constantly fed, and constantly spawning off sprogs that
eventually die When I say, die, I mean "heat death"... where there all
the goodstuff is so evenly averaged out that there is no potential for
any work to be done... perfect entropy or perhaps cold death, where the
sprogs inflate cooling themselves as they do simply freeze over...
either way, you have universes worth of matter an energy going to
waste... it would be elegant if the queen universe at the top of this
all was nourished by dead and/or sterile universes... can't suppose how
this would happen though.

The worst thing about this is that it leaves us in the same boat...
just on a different scale, the eventuality will be all matter and energy
becoming useless, not just in our universe, but on a multiversal
scale... the original big universe will die, having given all it's
goodstuff away to generations of universes that will eventually become
so watered down they can't reproduce. Multiversal death... which I'm
reliably told "sucks ass".

I do like the multi-verse idea as it parallels multi-dimensional reality and multi-dimensional thought, where thought travels as fast, if not faster, than the speed of light.

....but who is Prof Kaku?

Michio Kaku, professor of theoretical physics and co-founder of string field theory, is the author of nine books, including the best-selling "Hyperspace: A Scientific Odyssey Through Parallel Universes, Time Warps, and the 10th Dimension," and most recently, "Visions: How Science Will Revolutionize the 21st Century." His doctorate-level textbooks are required reading at top physics labs worldwide.

Just do a google search. Here's a good link to some bio info:

http://prop1.org/2000/cassini/9707kaku.htm