So we’re back to the OP’s terminated clade?
Just how do you think civilization came about? First was a multi-continent-spanning tool-using species, that then developed civilizations at various loci. Not all development in one Lost Valley. A disaster might wipe out the civilization itself, but not the path to it. That’s too ridiculous a notion to credit.
Toba didn’t come close to wiping us out, bottleneck or not. We were already too dispersed for that to happen,
Stuff we can all tell by the abundant artefact evidence. So even those collapses weren’t happening in some Lost Valley fantasyland.
They would look like worked stone and we can see that.
Unless you’re postulating a civilization that never used stone tools which - yeah, going to need more than Just Asking Questions for that one, thanks.
No, thanks, the dinosauroid was fantasy in 1982, it’s still fantasy now.
Like I said to someone else - wood that they obtained, how?
Do you think Native Americans were processing their shelter materials with their teeth?
I don’t find it difficult at all. The Gobekli Tepe culture is not a civilization. We already covered that.