Yawning is thought to cool the brain and make it more alert. Simultaneous yawning may occur when a group of people are all breathing the same warm, stale air. Or contagious yawning may have evolved to help groups remain vigilant against danger.
A yawn is a reflex consisting of the simultaneous inhalation of air and the
stretching of the ... This "contagious" yawning has also been observed in
chimpanzees, dogs, birds, and reptiles...
Mar 16, 2014 ... About half of adults yawn after someone else yawns due to a universal
phenomenon called “contagious yawning.” Researchers at Duke ...
Jan 11, 2016 ... Contagious yawning isn't a myth. It's a real, scientifically demonstrable
phenomenon. We yawn when we see someone else yawn. The sound ...
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 ...
Contagious yawning is associated with the same parts of the brain that deal with
empathy, according to a recent study. Learn about contagious yawning.
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 ...
Contagious Yawning - You've likely experienced contagious yawning. Learn why
contagious yawning exists and what causes contagious yawning.
Update (Jan 2016): I wrote this answer several years ago. Though it currently has
accumulated ... Do you all have any theories as to why yawning is contagious? Is
yawning contagious for blind people? Yawning: Why do humans yawn?
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 ...