I just ran across this entry in Wikipedia that claims there is evidence that humans have been eating land snails since the Pleistocene: http://en.wikipedia.org/wiki/Land_snail#Snails_as_human_food
I haven't seen snails or clams or mussels or other freshwater gastropods come up in any paleo discussions, blogs, books (not that I've read any in their entirety), etc. Since our ancestors would have spent most of their time near fresh water lakes and streams if possible, they'd have been eating not just a lot more fresh water fish, but also crustaceans like crayfish, mollusks like bivalves (clams, oysters, scallops) and gastropods (snails). Depending on the region, Grok would have seen bears, raccoons, otters or other animals prying the shells apart and then done the same, no?
(In that sense, I guess this question relates somewhat to the question I asked last night about why we can't just smell something and know if it's good or bad for us.)
I'm suddenly thinking a New England style clam chowder made carefully could be a very yummy paleo soup/stew! Butter, cream, clams, potatoes, onions, a hint of celery... mmmm!!!
So, this has me wondering: what other sorts of foods Grok would have had on his menu that we might still overlook today?