A new study in the journal Bioacoustics found that 65 different species of animals have their own form of laughter. Study co-author Sasha Winkler describes the sounds animals make during play.
The use of laughter acronyms and emojis in our writing hints that laughter itself may be best understood as a means of conveying important, socially relevant information.
Laughter is thought to have evolved as a form of social bonding in animals and as a way to express playful intention. Many mammals laugh when they are tickled and when they engage in physical play.