Let's look at the science behind a possibility. What makes something possible possible?

More and more evidence seems to point that our entire Universe is indeed inside a supermassive black hole. Guess we will see where this theory is gone go in few decades.

Black holes are likely the missing dark matter in the universe. Inside a dark hole is a true mess of particles in extreme dense condition. A kind of soup of particles something like neutron star but more extreme than that

Originally posted by American Guy No.1342:

I heard an interesting theory which states that there could be entire Universe inside a Black Hole.

I rather see proof of it instead of reading stories.

it is one theory.. that each universes including our own bigbang is the moment an black hole starts in another...
and while they will evaporate eventually.. time dialation works different.. so even for those microholes that dissipate in a fraction of a nanosecond.. to those inside that universe any amount of time can have happend.

the problem ofcourse is.. ok each universe births woth black holesvmultiple other like a matrouska doll but what made the top layer?

interesting theory but it has flaws.

and it also depends on how you view matter.
I view space as full with energy creating true vacuum.
think of water held back with force.. creating an airpocket.
matter is that.. while the universe is that water.
it is how energy is turned in matter and reverse..

this holding back water is also not stable.. that hollow core of air has waterbubbling toward its center with any randon peak being antimatter and opposide dip matter... there excists any number of these pairs everwhere in space all the time but the sum is 0
(zerosumenergy) matter than has the same effect only with just a few disceerepancy by the added energy.. causing more dips or peaks.. resilting in a sum greater or lower than 0 and thus matter and antimatter to apear.

but there are other models for what exactly is matter..

Originally posted by Christian:

Literally zero evidence for Schwarzschild cosmology. A few coincidences at best. "More and more evidence"? No.

Since the JWST launched the so far accepted cosmology theory has been pretty much on life support and is getting dealt blow after blow.

theres rare MTG cards on the other side of the black hole

Recently, two merged into one.

It's possible and I hope it's true, as it would open a lot of possibilities for the far future (e.g. creating a "baby universe" of our own).

But you need a deep understanding of brane cosmology, particle and quantum physics, and all the alternate theories in order to have an informed opinion on it, which I don't. AFAIK, physicists treat it as a serious possibility, but it's by no means the mainstream theory just yet.