[IYAS9YAS]

Went to Chaco recently. It is massive. There are multiple building sites, but Pueblo Bonito is the largest. The picture above doesn't do it justice. It's just something that has to been seen in person to understand how massive. Not only that, but at 6' 2" tall, my head would have been smack in the middle of the upper floor supports. There were three types of doorways, somewhat short and narrow (around 5' or so), shorter and wider (I'm 6' 2" and had to get on my knees to go through, and some that were like a thick capital "T", about 30" wide at the bottom, with the cross opening being about the same.

They were not big folks.

[gleeaikin]

One reason for low doorways in some cultures has been to make it hard for invaders to run in. It is a lot easier to clobber someone on the head if they have to bend over to walk in. Blam mentions that blood studies have been done. Does this include modern DNA comparisons between modern Zunis and modern Japanese or Ainu? It is well known that the Aztec language (Nahuatl) belongs to the family of Uto-Aztecan languages. The Utes are in the US. In some histories the Aztec are said to have originated from the savage freedom loving Chichimec tribes from northern Mexico. It is certainly possible that these were tribal groups driven out by the “civilized” tribes with their “urban” culture, that drifted down into northern Mexico, and some of whom eventually made it all the way to Mexico City where they developed their own warfaring civilization.
https://en.wikipedia.org/wiki/Chichimeca