Ok. Yes. Hmm I will try it on another map then. Yeah me too! That's what I want to do with my residential mod. However in doing so I would make it so a city cannot become unhealthy from over population. :/ Which is why I am still pondering on the subject. I plan to add a Mammoth and Megatherium unit for the "Mammoth Trainer" and "Megatherium Trainer" wonders under "Megafauna Domestication" tech. This tech represents the alternate timeline tech for the prehistoric era. I plan to have the following for each era ... Prehistoric - Megafauna Domestication Ancient - ? (Lost Technology) Classical - ? Medieval - ? Renaissance - Gearpunk Industrial - Steampunk Modern - Dieselpunk Trans-Human - Cyberpunk Galactic - ?