Yawning is very common in humans. It is usually associated with sleep, tiredness or boredom. However, there is much more to ...

Humans aren't alone when it comes to yawning — all vertebrates do it too, including fish, amphibians, reptiles, birds and mammals. But why? The "evolutionarily ancient" act of yawning likely serves a ...

If you see or hear someone yawn, you might suddenly feel the urge to do the same, thanks to a well-studied phenomenon known ...