SOCIALDIRT on Instagram: "In 1968, American scientist John B. Calhoun conducted one of the most shocking experiments in history — Universe 25. He created a mouse utopia — a perfect world where thousands of mice had everything: unlimited food, water, comfortable nests, and no predators. In this “paradise,” there was no struggle for survival. Universe 25 experiment, John B. Calhoun, Mouse Utopia, Behavioral Sink, Human Future, Psychology experiment, Social collapse, Universe 25 explained, Humanity