Ever catch yourself yawning just by reading about it? That’s no coincidence: yawning—stretching your jaw wide, inhaling deeply, then exhaling—is an ancient behavior shared by vertebrates, from fish ...

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.

It’s not obviously just mechanical, like a burp to release gas pressure, or just psychological, like a yelp to express fear or excitement. A yawn is more like a sneeze or a hiccup, an involuntary ...

Doctors say frequent yawning can indicate deeper health issues. If you’re a chronic, compulsive yawner then don’t ignore it ...