The Mouse Utopia Experiments

The Horrifying Study That Predicts Human Extinction

Down the Rabbit Hole
9 min readFeb 21, 2022

Dr. John Calhoun spent the 1960’s and 1970’s playing god to thousands of rodents. He dedicated his time to building better and better mouse paradises with beautiful buildings and limitless food, you could say he was like the congressman of his rat district, making life virtually issue free. Each experiment, he introduced a few mice and let them live and reproduce in paradise. But, shortly thereafter, the mice had created their own apocalypse… each and every time.

Experiment 1:

Dr. Calhoun’s work began in a time at which overpopulation had become a subject of great public interest, and had a considerable cultural influence. Rats were running rampant in Baltimore, Maryland and Calhoun saw them as an opportunity to study the effects of overcrowding in a confined space, with hopes to correlate his findings with human beings and the overpopulation of the city.

The first rat city was made in 1947 using 32–56 Norwegian rats in a 10×14-foot case in his backyard in Montgomery County. He separated the space into four interconnected rooms. Every room was specifically created to support a dozen matured brown Norwegian rats and ramps were accessible for rats to maneuver between rooms. It was dubbed “rat utopia” because rats were provided with…

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Down the Rabbit Hole

I write about true crime, mysteries, and anything that’s pulled me down a rabbit hole. Good luck climbing out.