Yawning seems like such a simple act, yet it holds surprising power over us. Just watching someone yawn — even a stranger — can suddenly trigger the irresistible urge to yawn yourself. Why does this ...

A yawn is an involuntary reflex that involves opening the mouth wide and taking in a deep breath, followed by a slow exhale. Several theories exist about why we yawn, but researchers have not proven ...

Everyone yawns, but no one knows why. We start when we are in the womb, and we do it through old age. Most vertebrate species, even birds and fishes, yawn, too, or at least do something that looks ...

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 is an automatic body response to tiredness or stress. Less commonly, excessive yawning can also be a sign of an underlying health condition. It can be related to the vagus nerve, sleep ...

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their ...