Can you explain more how your first link relates to the emergence of consciousness? I skimmed the linked paper and it didn't seem to be drawing any links with human history or evolution. I find both psychedelic drugs and the "hard problem" of consciousness to be deeply interesting, but I've never been persuaded by the Terence McKenna-type arguments that try to connect the two.
As I understand it, the research aims to show how the network effects of neurons compares between subjects that consumed a placebo vs those that consumed psilocybin from psychedelic fungi.