The "mutual vulnerability theory" I have been promoting in this blog series defines laughter as a vocal affirmation of mutual vulnerability. In the previous posts, in order to account for the ...

This article is republished from The Conversation. Laughter is an everyday reminder that we humans are animals. In fact, when recorded laughter is slowed down, listeners can’t tell whether the sound ...

Among humans, laughter can signify a lot of different things, from intimacy to discomfort. Among animals, however, laughter usually communicates something along the lines of “this is playtime—I’m not ...