#1. Monkeys value equality between one another. During an experiment, 2 monkeys were given some work to do and each completed it. One monkey received a good treat, while the other got a rock. The one that got the rock was definitely not happy.
Animal Encyclopedia.info is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
*Amazon and the Amazon logo are trademarks of Amazon.com, Inc., or its affiliates.
Additionally, Animal Encyclopedia.info participates in various other affiliate programs, and we sometimes get a commission through purchases made through our links.