In 1968, researcher John B. Calhoun conducted a famous experiment called “Universe 25,” where he created a “mouse utopia” with unlimited food, water, and no predators. Initially, the mouse population grew rapidly, but as it became overcrowded, their social behavior deteriorated. Huai Yothttp://reborn-babies-dolls.com/my-fake-baby-reborn-dolls-disturbing/ Mice began forming aggressive cliques, mothers abandoned or attacked their young, and some mice became isolated and apathetic. Even though resources remained abundant, reproduction eventually stopped entirely, and the population collapsed to extinction.
Calhoun described the phenomenon as a “behavioral sink,” suggesting that social breakdown, not material scarcity, led to the collapse.
