I've read somewhere an article which posited that our 3D universe might be inside a 4D black hole. When you cross a black hole's event horizon, the radial coordinate becomes timelike, so you lose one degree of spatial freedom. Movement is still possible in the tangential directions however, so what you get is basically an N-1 dimensional universe. So maybe our 3D universe is actually matter that fell into a 4D black hole, and our 3D black holes contain 2D flatland universes. And of course, the outer 4D universe might be in a 5D black hole, etc.
Research suggests Big Bang may have taken place inside a black hole
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Re: Research suggests Big Bang may have taken place inside a black hole
#102I speculate that the big bang is/was fueled by all the black holes that existed and will exist, like a huge cycle where all the energy sucked into black holes converges at the same point in time causing the big bang.
Fractal Universe - I discussed the idea with Benoit Mandelbrot back in '84 over beers, interning for him, before he'd published "Beauty of Fractals."
Cool anecdote!
Re: Research suggests Big Bang may have taken place inside a black hole
#103This was an interesting read, but I didn't understand exactly what leads to the big crunch. I get the exclusion principle leads to pressure, and this causes the bounce, but why would it continue to accelerate and then decelerate resulting in a big crunch? https://journals.aps.org/prd/abstract/10.1103/PhysRevD.111.1...
I don't understand where the rest of the parent universe is if all of the matter has emerged from the event horizon. Twisted into a new dimension, perhaps?
Re: Research suggests Big Bang may have taken place inside a black hole
#104If the crux of the article is the fermion bounce, and you compare that to how much matter and energy we are aware of, that is quite the black hole, which leads one to start wondering what environment it existed in to become that size. Even if it is now stuck due to a positive curvature of just bouncing back and forth.
I would like the article to acknowledge a bit more though that blackhole universe theories and speculation are quite old now, not radical and a striking alternative, as it is natural to think about it once you learn of the concept of event horizons. What differentiates this though is the analytical solution.
Re: Research suggests Big Bang may have taken place inside a black hole
#105Earlier quoted context omitted.
"beginning" is a misnomer, since time itself started with the Big Bang. There is no such thing as "before" the singularity, as time and space were curved together.
Time is a map of the states of consciousness, I believe consciousness/awareness of the universe has no beginning just infinite layers of abstraction.
This is meaningless technobabble.
Re: Research suggests Big Bang may have taken place inside a black hole
#106Earlier quoted context omitted.
There's no arrow of entropy, it's an invented useful model to describe something that nature does. Everything is like that, I.e. there's no electric field, it's a useful way to do calculations about particle interactions.
Of course these are models. And to be able to recognise that entropy increases with time is an example for their usefulness.
Does it increase over time or does it do its thing and in our model we decided that stages of it is called time?
Re: Research suggests Big Bang may have taken place inside a black hole
#107There was a youtube lecture I saw years ago that showed exactly what you'd see as you fell into a black hole and passed through the event horizon.
You'd see EVERYTHING that EVER crossed the event horizon. But critically, you'd see it EXACTLY as it was at the monent it crossed.
Sounds a bit crowded to me. Sounds a bit like I'd expect the big bang to look.
Re: Research suggests Big Bang may have taken place inside a black hole
#108The word "research" in this title is a handy placeholder for indeterminate conjecture. No research happened, it's a theory he made up.
Re: Research suggests Big Bang may have taken place inside a black hole
#109I've read somewhere an article which posited that our 3D universe might be inside a 4D black hole. When you cross a black hole's event horizon, the radial coordinate becomes timelike, so you lose one degree of spatial freedom. Movement is still possible in the tangential directions however, so what you get is basically an N-1 dimensional universe. So maybe our 3D universe is actually matter that fell into a 4D black…
Yes, and then there's the parlor game of guessing what familiar property of our known universe is actually a spaghetified fourth dimension.
I guessed c once. It would be a constant. Maybe all the constants are spaghettified remains of a superior universe.
Re: Research suggests Big Bang may have taken place inside a black hole
#110Could a computer simulation also contain another universe, with virtual black holes that have universes?