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...
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 ...
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?).
If you yawn in class, you'll probably notice a few other people will start yawning,
too. Why is that?
Feb 29, 2016 ... Excessive yawning is yawning that occurs frequently, sometimes without any
apparent reason. Learn about possible causes and treatments for ...
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
Jan 22, 2015 ... Learn the truth behind why we yawn, hiccup and get goosebumps. It's probably
not what you think.
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.
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, ...
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.