What did the Mesa Versa look like thousands of years ago? What exactly happend to baby’s that did not survive those times? What’s one of the coolest things about the Mesa Verda?

I think the landscape was much the same as it is today

It is surmised that the population was forced to relocate due to deforestation...there is evidence they wound up in northern New Mexico

From my understanding, all survived. They just elsewhere .It was the Pueblo Indians.

Just like it does now. Thousands of years is a moment in time geologically. If you're referring to Indian babies they were buried in the Indian burial grounds. One of the coolest things is the degree to which everything is preserved. You can easily envision life a thousand years ago. Great experience.

Acient Aliens relocated the population to save from the horde of Invaders from the east