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 ...

Yawning, a general indication of sleepiness or boredom can actually serve as an indicator of underlying health problems. While it's easy to link yawns to late nights and early mornings, professionals ...

Open your mouth wide, stretch the muscles of your jaw and upper body, take a slow breath in, and then exhale quickly. What have you done? You have yawned. Many animals, including humans, yawn. They do ...

Dear Reader: We all yawn frequently, more often in the early morning and late evening. Does it mean we’re tired? Bored? Short on oxygen? As common as it is, we know little for certain about yawning.

Is it true that we yawn when our brains are deprived of oxygen? Most of us can feel a yawn coming on. The muscles in our jaw begin to tighten, our nostrils might flare, and our eyes might tear up as ...

We have all heard about viral yawning: Someone in the room yawns, and seconds later, half the group is ready to unleash their own. Contagious yawning has always seemed a little silly, a party trick of ...