:o
do they have a name?
I just found out about this place:
Cahokia - Wikipedia, the free encyclopedia
The wiki includes the claim that the city might have housed between 6000 and 40000 people at its peak (quite a large spread), but I haven't found how they came to that conclusion.
Having the stereotypical idea of native americans as tent-dwelling nomads, I'm tempted by the idea that there is a bit of wishful thinking going on by US archaeologists who might be a bit envious of all the large (preserved...) cities in South America and the Middle East.

Nah, it's cool they found all these things. I love this stuff (although to be honest I prefer written records and/or clear physical artefacts to the guestimating that comes with reconstructing history from pottery shards)