[quote=@Ascendant]
We seem awfully close to pottery without having discovered it.
[/quote]

I suppose that's true. 

My thought process for the Crowe at least was "ey skull holds water somewhat" going to "wait i dropped it on muddy ground...ey, it holds more water now???" to "wait, if we cover the holes with mud, that kinds makes it hold water better" to finally "wait, we left mud skull by fire...ey, that feels kinda hard. dat's nice". XD