The Big Bang may be a black hole inside another universe.

[Buckeye_Democrat]

https://medium.com/the-infinite-universe/the-big-bang-may-be-a-black-hole-inside-another-universe-79ce12613c60

The idea that we are living inside a black hole isn’t as crazy as it sounds. Black holes warp space and time to the point where space and time reverse roles. For anyone falling into a black hole, the radial dimension, towards the singularity, becomes time and the time dimension becomes like space.
The two well known predictions from this are that, from inside a black hole event horizon, (a) you cannot escape because the way out is back in time and (b) you can see the entire universe’s future because time in the universe you left is now like space. Too bad you can’t tell anyone about it.
Another prediction is that the infinitely compressed central singularity of the black hole lies in your future as you fall in. When you reach it, nobody knows what happens because the laws of physics as we know them literally break down. Whatever the theory of quantum gravity ends up being might explain it, but for now we have no idea.
The basic idea for the Black Hole Big Bang Theory (BHBBT) is that matter from a mother universe collapses into a black hole. The singularity of this black hole is at a single point in space with respect to anyone in the mother universe. But, because of the reversal of time and space for anyone inside the daughter universe, that point in space r=0 become their initial point in time, t=0. Hence, what was a singularity in space is now a singularity in time, just like the Big Bang.
This means that any matter falling in from the mother universe will disappear from that universe and emerge at the initial t=0 point of the daughter universe thoroughly scrambled.
Not only that, but what emerges at the Big Bang is not just the matter that was there at the black hole’s formation but all matter that ever fell into it. That is because time at the black hole’s singularity is essentially perpendicular to time in the mother universe outside.
The reason why a whole other universe can be contained inside another one has to do with the strange way in which time and space can be warped, stretched, compressed, and twisted. What appeared to be a deadend at the center of a black hole, can instead be a passage way into the birth of a new universe.
You can have many interconnected universes this way, in which mothers give birth to daughters which give birth to more daughters, and so on ad infinitum. Thus, far from being only 13.8 Bya (Billion years ago), the whole interconnected cosmos can be infinitely old or more properly timelike paths can be infinitely long into the past passing from universe to universe.
This is not the same as the Many Worlds Interpretation of quantum mechanics that I have criticized in recent articles of course. There is no constant splitting of universes based on quantum observations. Rather, this is a process that occurs through black hole formation, and each universe would be essentially unique, although daughter universes would share characteristics of their mothers. There wouldn’t be exact copies of you running around.
Indeed, some have argued that a process of natural selection may take place with these universes, since the only universes that can reproduce are those that can form black holes. It is also a potential resolution of the anthropic principle, the theory about why human beings exist, since each universe may have slightly different laws of physics. Just as not all planets can support life, not all universes can. No many worlds interpretation required just many distinct universes within a single spacetime.

(More at link)

Side-note from me:
Coincidentally, what would be the Schwarzschild radius of a black hole with the estimated mass and energy of our observable Universe? About 13.7 billion light-years, which matches the estimated age of our Universe!
Some physicists proclaim it's meaningless, though, since they'd expect a match from Einstein's General Relativity equations.

[PCIntern]

1. Thank you!

Went to the article and saved it as a favorite. Going to send it around to friends.

[keithbvadu2]

2. I find these articles interesting but that's about as far as it goes.

I find these articles interesting but that's about as far as it goes.

Any deeper than that is beyond my ken and I'll never understand it.

Even the big-name astrophysicists promote it as only a possible theory.

It could make a good science fiction story.

[Buckeye_Democrat]

3. Yeah, there's definitely no consensus.

I'd say the consensus at this time is that it's not true, but nobody really knows.

[keithbvadu2]

4. One could say 'prove me wrong',

One could say 'prove me wrong',

but our mortal time frame doesn't provide a big window for full research.

[silverweb]

5. I love this stuff.

While I can't begin to understand the mathematics and physics of it, I nevertheless find it endlessly fascinating. Every tantalizing bit of new information reinforces my conviction that our universe is far weirder than we can possibly imagine. Continued discovery feeds endless speculation and a lifetime's meditation.

[William Seger]

6. Hmmm, wouldn't that devolve into smaller and smaller universes?

If our entire universe came from a single black hole in a mother universe, it presumably only swallowed an almost insignificant fraction of that universe's matter and energy, and if our daughter universes cannot be bigger than what a single black hole here can swallow, it seems to me the process would grind to a halt when daughter universes get to be too small to create any new black holes.