A yawn is a reflex consisting of the simultaneous inhalation of air and the
stretching of the eardrums, followed by an exhalation of breath. Yawning (
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.
Yawn definition, to open the mouth somewhat involuntarily with a prolonged,
deep inhalation and sighing or heavy exhalation, as from drowsiness or boredom
Sep 23, 2011 ... People yawn more easily in cooler temperatures, supporting the idea that
yawning cools the brain.
Everybody yawns — from unborn babies to the oldest great-grandparent.
Animals do it, too. But why, exactly, do people and animals yawn? No one knows
Jun 28, 2013 ... Pinpointing exactly why we yawn is a tough task, but the latest research suggests
that our sleepy sighs help to regulate the temperature of our ...
Apr 14, 2014 ... Yawning may be the opposite of what we think—not a signal of sleepiness but a
signal that it's time to act.
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: ...
To open the mouth wide with a deep inhalation, usually involuntarily from
drowsiness, fatigue, or boredom. 2. To open wide; gape: The chasm yawned at
our feet ...