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 ...
If you yawn in class, you'll probably notice a few other people will start yawning,
too. Why is that?
May 12, 2014 ... A new study has suggested that the reason we yawn has nothing to do ... thanks
to the yawning and your newly-cooled brain, you're probably ...
Jun 28, 2013 ... Cats and dogs do it. Even human babies do it inside the womb. And maybe after
seeing the picture above, you're doing it now: yawning.
Jan 22, 2015 ... Learn the truth behind why we yawn, hiccup and get goosebumps. It's probably
not what you think.
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, ...
Apr 14, 2014 ... “You don't decide to yawn,” Robert Provine, a neuroscientist and the author of “
Curious ... Indeed, fatigue and boredom do reliably elicit yawns.
www.ask.com/youtube?q=Why Do You Yawn?&v=I0dQx4SNSwE
Mar 12, 2014 ... What makes yawning so contagious? Watch the 'Yawn-O-Meter': http://bit.ly/
1qwFDrx SUBSCRIBE: http://bit.ly/10kWnZ7 Instagram and Twitter: ...
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.