YOUNG WORLD

Monkey's sense of justice

Monkeys have a sense of justice. They will protest if they see another monkey get paid more for the same. Researchers taught brown capuchin monkeys to swap tokens for food. Usually they were happy to exhange this "money" for cucumber. But if they saw another monkey getting a grape — a more liked food — they took offence. Some refused to work, others took the food and refused to eat it.

Compiled by SELINE AUGUSTINE

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