January 23, 2013 Lost City of Cahokia

[ZenGum]

The number of natives in the western hemisphere circa 1492 seems to be about 40 million. Working back the 25,000 years or so there seems to have been natives, it's easy to come up with maybe 100 million have lived (and left trash behind) in the Americas.

These numbers seemed high to me, so I had to go and look stuff up.
The 25,000 years I'll go along with, although it's not really certain. There's quite a puzzle about the early migration to the Americas.

But 40,000,000 in 1492? That a HECK of a lot. And it would project backwards over just a few generations to well over the 100 million all time tally you wrote. Did you mean 4 million?