Why do we yawn? Yawning is a universal gesture. Everyone yawns, from babies still in their mother's womb to the elderly. However, the exact reasons for this reflex are not well understood. Is it just ...

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 ...

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 ...

Is it true that human yawns are contagious to dogs? Some dog owners swear that when they yawn, their dog does, too. And they may be right. Contagious yawning is a well-known phenomenon among humans — ...

Lions find yawning contagious in a similar way to humans, a team of researchers has found. The phenomenon may be a way of helping the big cats to stay vigilant, scientists believe. The team, from the ...