Can we say that the Big Bang, or shall we say, THAT Big Bang, 13.7 billions years ago, came from the singularity explosion inside a black hole? And, if so, where the hell did THAT black hole come from? Unless there had been a former universe? (ChatGPT, 2025-7-5)

 Yes, we can say that — but we would be stepping into the most speculative, yet deeply fascinating, territory of cosmology. What you’ve just outlined touches upon one of the boldest philosophical and scientific hypotheses about the origin of our universe: that the Big Bang was not the beginning of everything, but rather a transition, a bounce, or even a birth from death — possibly from within a black hole of another universe.

Let’s unpack this carefully, in layers:

✦ 1. 

Can the Big Bang come from inside a black hole?

This is not just poetic metaphor — some serious cosmologists think so.

• The black hole cosmology hypothesis (e.g., by Nikodem Popławski) suggests:
  The Big Bang could have been the other side of a black hole’s singularity — that is, the interior of a black hole in a parent universe.
• According to Einstein–Cartan theory (a modification of general relativity that includes spacetime torsion), the singularity is avoided; instead of collapsing to a point, matter “bounces” back — and this bounce becomes a new universe.

So yes, in this view:

A black hole’s interior may not be an end, but a cosmic womb.

This makes each black hole potentially a seed of a universe, and our universe might be the interior of one such black hole — the offspring of a former cosmos.

✦ 2. 

Then, where did THAT black hole come from?

This is the real cosmic recursion. If our universe emerged from a black hole in a parent universe, then:

• That parent universe may have had stars, gravity, life — and its own cosmological story.
• One of its black holes grew massive, and eventually budded off a child universe — ours.

But this can’t go on infinitely, can it?

Well — some physicists (including Roger Penrose) propose models like:

• Conformal Cyclic Cosmology (CCC):
  Universes arise one after another in cycles, each ending in a cold, expanded state that maps conformally onto the Big Bang of the next.

And others suggest eternal black hole branching:

Universes birth baby universes via black holes in an ever-growing, multiversal tree.

So yes:

The question “Where did that black hole come from?” may point to a former universe, or a cyclic cosmos, or an eternal fractal multiverse.

✦ 3. 

So, is the Big Bang a beginning or a continuation?

In this view:

• The Big Bang is not the origin of everything, but the visible origin of our universe — a phase transition, not a first cause.

It is our local “Genesis”, but perhaps not The Genesis.

✦ 4. Poetic Reflection

So maybe we are the echo of a death scream from a collapsing star in some unimaginable parent cosmos.

And maybe black holes, far from being final, are wombs of universes, tears in one reality that drip into the next.

And if so, then our own black holes — the quiet abysses in the hearts of galaxies — may each carry the spark of another Big Bang.

In this view, the cosmos is not a line, but a loop; not a story with beginning and end, but an infinite recursion of births inside deaths, and deaths inside births.

✦ Would you like…

1. A piece titled:
   “The Womb of the Cosmos: Did Our Universe Come From a Black Hole?”
2. Or one more poetic:
   「黑洞之子：宇宙的循環與創傷」
3. Or even a cosmic-dialogue form, between “The Child Universe” and “The Parent Collapse”?

Just say the word, my friend — we’re standing at the mouth of eternity.