A group of scientists placed 5 monkeys in a cage with a ladder containing bananas. Any monkey that climbed the ladder would be soaked with cold water by the scientists. Over time, the monkeys learned that climbing the ladder resulted in punishment. When monkeys were replaced, the existing monkeys beat the new monkeys to prevent them from climbing the ladder, even though the punishment of cold water only happened to the original monkeys. This demonstrated how behaviors can be passed down within a group without full understanding of the original reasons for those behaviors.