files mysterious on Instagram: "The 'Universe 25" experiment is one Of the most disturbing studies in the history of science, carried out by American scientist John Calhoun between 1958 & 1962. Calhoun designed an ideal environment for rats, called "Mouse Paradise", with abundant food, water and space, in order to study the social dynamics of a growing population. Initially, the colony prospered, but after 317 days, population growth began to stagnate. Upon reaching 600 mice, serious social prob