> So we arrive back at the Great Filter problem. The dinosaurs lived on
> earth for millions of years, but never evolved into tool-using creatures.
> Why?
>
> Terence McKenna has suggested that when our ancestors discovered
> psychedelic mushrooms, that stimulated them to start thinking, talking,
> and using tools. That was when they broke through the filter and
> started making progress. Without mushrooms, we could have been
> stuck in an evolutionary cul de sac for eons, like the dinosaurs.
>
> Lyle
Why should psychedelic substances have been available to our ancestors
but not the dinos?
--Sean H.
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