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 ...
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.
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.
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 ...
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
Aug 12, 2014 ... Yawning has puzzled scientists for more than two millennia. But could a new
theory settle the question once and for all? David Robson ...
Feb 29, 2016 ... Excessive yawning is yawning that occurs frequently, sometimes without any
apparent reason. Learn about possible causes and treatments for ...
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 ...