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Yawn - Wikipedia


A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the ..... George Washington said, "If You Cough, Sneeze, Sigh, or Yawn, do it not Loud but Privately; a...

Why We Yawn - WebMD


Sep 23, 2011 ... 23, 2011-- Why do we yawn? ... So do most vertebrate animals. ... When you start to yawn, powerful stretching of the jaw increases blood flow in ...

Facts About Yawning: Why We Do It, Why It's Contagious And More ...


Jun 10, 2013 ... We all do it, and we all know it has at least something to do with how tired we feel . ... about yawning can trigger one (did we get you yet?).

Why Do I Yawn? - KidsHealth


If you yawn in class, you'll probably notice a few other people will start yawning, too. Why is that?

Excessive Yawning and What You Can Do About It - Healthline


Feb 29, 2016 ... Excessive yawning is yawning that occurs frequently, sometimes without any apparent reason. Learn about possible causes and treatments for ...

What makes us yawn? | HowStuffWorks


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  ...

Why Do We Yawn, Hiccup and Get Goosebumps? - Health ...


Jan 22, 2015 ... Learn the truth behind why we yawn, hiccup and get goosebumps. It's probably not what you think.

Here's Why You Yawn - Live Science


May 29, 2014 ... Question: Why do we yawn? Answer: There are several theories about the cause of yawning. One of them has begun to gain more advocates.

8 reasons for excessive yawning you probably didn't know about ...


Sep 6, 2015 ... Fatigue or drowsiness: When you are tired or sleepy, it is common to yawn. While the exact mechanism of why we do this is yet unknown, ...

Why Are Yawns Contagious? | Mental Floss


Jun 11, 2015 ... What is yawning? And why do we do so much of it? ... If you yawn while reading about yawning, it's not because you're “picturing” a yawn.