Oldest human-made structure in the Americas is older than the Egyptian pyramids

[GreenWave]

5. Sorry for the lengthy delay

Back in the PC saddle again.

I am seeing in many ancient cultures the lack of trumpeting what they do. China for example probably reached West into California building rudimentary walls and on the East Coast the word Appalachia is said to be Chinese in origin.

So what we know we often need several grains of salt as new intel is coming in frequently.

Barcelona claims Criistofer Colom as their own. After the first of 4 voyages he betrays nascent Spain and goes to Portugal seeking financing. This would lead to the line of demarcation. I suspect the Inquisition did not view too kindly his unholy approach and he may he been partially expunged. (As an anecdote, once the Spanish Inquisition decided that Quixote was blasphemous and subject to a 250 year ban, the French Inquisition swept in and helped distribute it in the New World making the early versions extremely popular.)

Others will rob and plunder never once publicizing their nefarious deeds so they can repeat and repeat

Here we also have possibilities of Aztecs starting out in the Great Lake regions, normally dominating where they went. Major exception the Apache. They are often credited with building pyramids when I last left off, those were built by Teotihuacanes and that fame would be usurped.

To your point mounds are in many places in the US. Perhaps they last longer and can reach heights in regions where stone is not the preferred tool of the trade.
Sorry for rambling.