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 ...

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 ...

You may well be yawning just reading this - it's contagious. Now researchers have looked at what happens in our brains to trigger that response. A University of Nottingham team found it occurs in ...

But why? Surely we cannot all be that tired. The truth is the science behind yawning is much more complex than just a few hours too little sleep. Even more complex? Why we seem to yawn because ...

Are you yawning yet? Thought so. Infectious yawns are as frustrating as they are intriguing. Sometimes it's enough to need to see someone yawn, hear them talk about it or even read about it for ...