[atonalfreerider]

Roger Penrose came up with a very plausible theory that the heat death of our universe looks like the big bang moment, from the perspective of a photon. So our universe is caught in a cycle of birth death rebirth ad infinitum.

[0] https://www.indiatoday.in/science/story/big-bang-didn-t-star...

[paulrouget]

iirc the CMB clues he’s talking about to justify the CCC have been ruled out.

[philipov]

While Penrose's specific theory is probably not correct, it does provide a conceptual framework to imagine how such clues might be possible.

[hathym]

but what created that loop in the first place?

[tsimionescu]

There isn't a logical rule that says everything must have a beginning.

For example, do you think it's necessary to ask what created the natural numbers? When did they begin existing?

[layer8]

That question makes as much sense as asking “but what will be destroying the loop?”.

[scollet]

It's possible that there never was a first place.