Why do people yawn while seeing other people who yawn? —Mithra, age 7, Chennai
Yawning happens when you open your mouth, take a deep breath and take in air without even thinking about it. You might be tired, bored or waking up. Most people yawn six to 23 times a day – even animals yawn!
You may have noticed that you often yawn after you see someone else yawn. This is called “contagious yawning”.
