The hypothesis is that these black holes were not created from stars, but exists from right after the big bang.

https://en.wikipedia.org/wiki/Primordial_black_hole

One of the hypotheses. Pop III stars could have gotten pretty big but probably not as big as that one. Hopefully JWST will turn up some direct evidence for them.

Yeah, the issue is that when large amounts of matter gathers into the accretion disk of a black hole it creates more and more friction as it falls in. This friction generates a lot of heat (and therefore pressure) which pushes back on the in-falling matter, slowing down the accretion process. If there's an overwhelming amount of matter the accretion will disk will get so jammed up and energetic the black hole will start firing off high-energy relativistic jets from its poles.

If you start with a stellar black hole of say 10 solar masses and then throw millions of solar masses of material at it, the above processes will slow things down dramatically, and you won't be able to get a supermassive black hole instantly.

what if those old giant blackholes were created by all the missing antimatter that we dont see in the CMBR.

>The puzzle here is that astronomers have no clear picture of how these ultra massive black holes are formed so early in the evolution of the universe.

Perhaps we're in a black hole now, and the universe only seems "young" (its current age of ~13B years) because that's when it fell into the black hole.

Oh man, you're breaking my brain.

Another theory is that black holes (or some black holes) are what we understand under dark energy.

https://phys.org/news/2023-02-scientists-evidence-black-hole...

https://www.youtube.com/watch?v=EGe5qvIzjTY