What Is Yawning? | SiOWfa15: Science in Our World: Certainty and Controversy
Is yawning a tool for wakefulness or for sleep?
Yawning and airway physiology: a scoping review and novel hypothesis | SpringerLink
Why Yawning Is Contagious | Time
Open wide: why yawning reveals much about your level of empathy | Life and style | The Guardian
Yawn - Wikipedia
A simple slice of science - Why do we yawn? - Dr. How's Science Wows
Why Do We Yawn + Are Yawns Really Contagious? - Casper Blog
Why Do We Yawn? - YouTube
Why do we yawn and is it really contagious? | NationalWorld
Why Do We Yawn? - The New York Times
What is it about yawning?
What Is A Yawn? - YouTube
Why Do We Yawn & Is It Contagious? | How To Sleep
Yawns Are Cool · Frontiers for Young Minds
Yawning: Causes and reasons for contagious yawning
Why Is Yawning Contagious? | Mental Floss
Why Do We Yawn When We're Sleepy? Everything You Should Know
Why do we yawn? | Library of Congress
If sex is a yawn, you may actually be turned on
Yawning doesn't catch on in babies › News in Science (ABC Science)
