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 (
Sep 23, 2011 ... People yawn more easily in cooler temperatures, supporting the idea that
yawning cools the brain.
Aug 19, 2014 ... Scientists working to unravel the mystery surrounding the yawn, and why it's
contagious, have discovered that yawning is much more ...
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
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.
Jun 10, 2013 ... We all do it, and we all know it has at least something to do with how tired we feel
. But unlike sleep apnea or laptops in the bedroom, yawning is ...
May 12, 2014 ... A new study has suggested that the reason we yawn has nothing to do with
tiredness or boredom, but actually works in order to cool down our ...
Jun 11, 2015 ... What is yawning? And why do we do so much of it? Neuroscientist and yawn
expert Robert Provine says it's “ancient and autonomic.” It stems ...
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.
Feb 29, 2016 ... Excessive yawning is yawning that occurs frequently, sometimes without any
apparent reason. Learn about possible causes and treatments for ...