D'mon on Nostr: What happened to them? I can't connect the dots. On on hand some kind of a ...

What happened to them?
I can't connect the dots. On on hand some kind of a cataclysmic event, on other hand tunnels with well arranged bones and architecture that withstand time.
Also, concept of moksha to break out of the reincarnation wheel.
🤔🤯💀👽