How to pronounce“mesoamerica”in English

In Mesoamerica, there used to be neurosurgery, and there were these neurosurgeons that used to treat patients.

Early Mesoamericans improved the rubber slightly by mixing the latex with juice from the tropical morning-glory, a local flower.

That remained in Mesoamerica.

In terms of Mesoamerica, looking at your map here, I'd say about halfway through the Chihuahua desert up there in the top left.

The classical civilizations of Mesoamerica, or what is now Mexico and Central America, didn’t “leave behind” as many paper sources as those of the Indian or Greco-Roman

They're not Mesoamerican, they have different lives.

A number of Mesoamerican civilisations have written records using such glyphs, including the Zapotec and the Aztecs, but the most successfully deciphered is the Mayan system.