It was the late 1960s and early 70s when behavioural researcher John B. Calhoun conducted an experiment called Universe 25, where he created a utopian environment for mice, some think serves as a ...

In the 1960s, behavioral researcher John Calhoun created what he hoped would be a kind of paradise—at least for rodents. His experiment, now known as Mouse Utopia, offered everything a mouse could ...