NPA personality theory
[ Post a Response | NPA personality theory ]
Re: Chimps can vary their smiles like humans
Edited by board administrator August 3, 2017, 6:54 pm
I'm not sure if the researchers really understand what the smile is about, but sooner or later it will be recognized that it is a marker of a major personality trait: sanguinity.
But the chimp smile has not been forgotten. By coincidence. it makes a major appearance in our latest brochure: