[moondrek]

Being entirely naive to squid prehistory, the wikipedia page for squid shows two apparent-to-me squid fossils [0]. Is there some nuance here that I'm not aware of?

[0] https://en.wikipedia.org/wiki/Squid#Evolution

[fermisea]

Not sure about squids in particular, but the easiest way isn't necessarily to find remains, but to see negative prints on sediments.

[hn_throwaway_99]

Tons of fossils are "negative prints on sediments". GP's assertion that "If humans didn't exist while they do, we would have never known about them" is clearly wrong.