The average adult yawns 20 times per day. And when you feel a yawn coming on, it can be nearly impossible to suppress. But why does being around other yawners make you yawn? PBS NewsHour asked a ...

If your head is overheated, there's a good chance you'll yawn soon, according to a new study that found the primary purpose of yawning is to control brain temperature. The finding solves several ...

It happened this past week -- a yawning gap in our knowledge filled at last. Humans do it ... chimps do it ... even educated dogs do it. We all do it: We all tend to start yawning when we see, or even ...

When your pet dog yawns after you do, it's just one more sign that man's best friend is acutely sensitive to human feelings. As researchers continue to debate the significance and origins of yawns in ...

Even fetuses yawn, a new study shows. During the second and third trimester, fetuses yawn frequently, and those yawns can be distinguished in four-dimensional ultrasounds from other mouth-opening ...

We have all been there: someone is speaking to you or you are in the middle of a meeting and a yawn signals its arrival. What do you do? A yawn is commonly thought to indicate fatigue, or worse, ...

You know the feeling. It’s impossible to resist. You just need to yawn. A yawn consists of an extended gaping of the mouth followed by a more rapid closure. In mammals and birds, a long intake of ...

Experts discuss the mysteries of yawning at first ever international conference. —LONDON, June 28, 2010 -- For two days last week, they came to Paris. Over two dozen experts in the field of ...

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 ...

Yawning is a normal human reflex, but scientists are still not sure why it happens. Some people find that their eyes water when they yawn. This may be due to pressure on the tear glands or eye fatigue ...

If you’ve been wondering if that nasty, aggressive coworker is actually a psychopath in disguise, there might be a little clue: Try yawning and see if he or she yawns back. People high in psychopathic ...

Bears do it; bats do it. So do guinea pigs, dogs and humans. They all yawn. It's a common animal behavior, but one that is something of a mystery. There's still no consensus on the purpose of a yawn, ...