This is from 2014, when I was actively teaching a river ecology course at Michigan State University. Part of the course had us taking daily trips to the Red Cedar river, which flows through the center of campus. Once per class, per semester, I would fursuit and lead my class through campus to the study site. The curriculum had a section on how a single variable (such as nitrate intake) could completely change the environment of the river in terms of species diversity. Tycho Aussie taught a visual lesson on how this happens, and I would have the students take notes in terms of population density, human interest, traffic, etcetera, both before, during, and after the lone fursuiter was added to the class. A single variable: A talking dog, and the whole environment changes: People ride up on their skateboards, bikes, etc. Traffic grinds to a stop on Farm Lane. People crowd the classroom windows in the neighboring buildings. Some bystanders thought it was fascinating whereas others thought it was creepy and avoided the sidewalk...It was a good lesson on how a single variable could radically change the environment and the section head of our ISP program thought it was brilliant.