Broad Boundaries

The boundaries in the story world encompass the entirety of earth on two separate planes of existence with events occuring simultaneously on multiple continents in multiple cities.

Earth One: Humans control this earth with no animals in sight. Civilization keeps moving as it had but with major restrictions on diet, labor, and food rationing. Humans need to create new ways to survive on this earth by using science.

Earth Two: Animals control this earth with no humans in sight. Humanities remnants are apparent and even become staples of animal innovation. Though still coming off of their primal ways, animals begin to tribalize and learn from the humanities technology essentially reverse engineering for their own use.