Disclaimer: these questions come after a usual 'philosophical discussion' with my dad...which usually involves a few mind-loosening, tongue-warming libations...so take the logic (or perhaps lack thereof) with a grain of proverbial salt.
In the food thread, we have been talking about several types of grain. And as my dad and I were discussing this and that, a thought both occurred to us: how did the ancients (not just the Romans, but the other ancient cultures) store their grain?
The North American Amerindians came up with the idea of the silo--and theirs, by and large, looked like squirrels' nests, with a conical shape above ground. (Dad was the source on this...no idea where he read it, but I know it's out there.) I guess one could conceive of a double-glazed clay pot to store grain...but neither of us knows or has a clue as to what was used.
A secondary question: it's been documented (here and elsewhere) that one way for cultures to preserve their grain is to make an alcoholic drink from it (beer, etc.). Do we know how storing this (yummy!) foodstuff came about? It would require a large kiln in order to bake off a large series of pots...so I'm guessing (and that's what this really is) that this was an accidental discovery, made in small clay pots, and then taken on a larger scale. Any other thoughts?