Ever noticed how one yawn can trigger many? Science reveals how your brain copies others, why yawns spread so easily, and what this curious habit says about humans.

From a baby to an adult, and even animals, yawning is one of those things that most of us do multiple times a day, especially if we feel tired or bored. Fun fact: I have yawned at least three times ...

Johanna Simkin does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...