How Fast Is Yawn Air Inhale?

A yawn pulls air into your lungs at about 7 km/h through an expanded throat — roughly 1.5× the volume of normal breathing. Yawning is famously contagious across humans, dogs, chimpanzees and even some birds.

Contagious yawning is linked to empathy and social bonding — people who score higher on empathy tests are more likely to 'catch' yawns from others.

• Slightly faster than brisk walking
• Contagious across multiple species