Why is yawning contagious? - Claudia Aguirre
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Do animals yawn contagiously? Check out this article about puppies. Here's another one about tortoises. One more about chimpanzees.
The real reason we yawn.
Frans de Waal speaks about moral behavior in animals, and he briefly mentions yawning. Check it out.
Next time you're in a meeting, try this little experiment: Take a big yawn, cover your mouth out of courtesy and watch to see how many people follow suit. There's a good chance you'll set off a chain reaction of deep breaths and wide-open mouths. And before you finish reading this article, it's likely you'll yawn at least once. Don't misunderstand, we aren't intending to bore you, but just reading about yawning will make you do it, just as seeing or hearing someone else yawn makes us do it, too.
Here's an article on Huffington Post titled: Facts About Yawning: Why We Do It, Why It's Contagious And More
Michael Stevens of Vsauce also takes a stab at answering the the tough questions: why do we yawn and why is it contagious?
Just for fun, the lesson creators yawned for us:
Create and share a new lesson based on this one.