Is There Evidence That Other Animals Laugh Like Humans?

Sophy was drawn to studying laughter because she was interested in how humans express emotions. Most of the previous work on the subject had focused on visual cues. Sophy asked, what about sounds? I got into laughter by being interested in non verbal vocalization. So something like me going oh when i'm surprised, or screaming in terror. And it was looking at those and then starting to look at different kinds of expressions thate may be more positive emotion as well as negative emotions like fear and anger, is what actually led me to laughter....