The science behind yawning and its mysterious behavior 03:38. Humans aren't alone when it comes to yawning — all vertebrates do it too, including fish, amphibians, reptiles, birds and mammals ...

We all do it: We all tend to start yawning when we see, or even hear, someone else yawning. A lion yawns in its enclosure at the zoo in Augsburg, Germany, on August 2, 2017. Karl-josef Hildenbrand ...

"We think contagious yawning is triggered by empathic mechanisms which function to maintain group vigilance," says Dr Gordon Gallup, a leading researcher at the university. 'Herding behaviour' The ...

Yawning may appear the height of rudeness, but in fact your body is desperately trying to keep you awake, according to research from the US. Psychologists who studied 44 students concluded that ...