The primate laugh is given in playful contexts, and as such has a strong similarity to the human laugh.
Frans de WaalWhen we are bad, we are worse than any primate that I know. And when we are good, we are actually better and more altruistic than any primate that I know.
Frans de WaalStudies of reconciliation in primates have demonstrated that if the relationship value increases between two parties they are more willing to make peace.
Frans de WaalWhen it comes to social interaction, the chimpanzees appear to be just as intelligent as we are.
Frans de Waal