. out of a couple of hours a couple of days weeks of months to systematically. elect observations into our computers and analyze the. earth has managed to decode the facial expressions displayed by great apes. facial expressions are associated with with fear and with to take his behavior. one of the expressions that he identified the play face. relaxed open mouth expression and expression that's reminiscent of human after. he had the small one hits the big one that couldn't be serious of course both of them showing a beautiful play face while still doing that he sticks it out while he's doing it