> In the late 1960s, US scientist John B Calhoun created a ‘Mouse Utopia’ – an artificial environment which provided what he regarded as the perfect breeding conditions. To everyone’s amazement, and without any signs of disease or hardship; **after a few months of rapid population growth**, the mouse colony ceased to reproduce at all; and soon became extinct – every single mouse dying within three years.
Biggest question: Since the conditions were not changed, and the population was growing while low, why did it not grow again after the deaths shrank it back to the starting size?
In: Biology
Because of the social and psychology effects that was engraved into the rats. Even those who survived exhibited the same traits.
The death of the rats is caused by several factors, but all of them lead to the declining future generations. Inability to raised the youngs, fewer births, social behavior, and unsimilar traits to the original rats ultimately sealed their fate.
Latest Answers