Two capuchin monkeys are sitting in separate chambers where they can see each other. Researchers have asked each monkey to do the same task, and they both earn a reward for performing it correctly. But one gets cucumber slices and the other gets grapes—a much tastier treat. At first, the monkeys do the task and get their respective rewards, no problem. But then the monkey getting cucumber slices glances over and notices her companion’s grapes. She throws a huge tantrum, tossing away her cucumber slices. READ MORE >>
October 25, 2012
