Study: Yawning Is Contagious, Except for Psychopaths

Study: Yawning Is Contagious, Except for Psychopaths

Psychopathic traits make people immune to contagious yawning

Yawning Contagion in Bonobos Depends on How Closely Related They Are

Yawning Contagion in Bonobos Depends on How Closely Related They Are

Scientists say yawning is an unconscious way of communication

What's Yawning For?

What's Yawning For?

For cooling the brain