Scientists from City St George’s, University of London created a terrifyingly realistic android head to determine whether ...

Since yawning increases blood flow, it is not unreasonable to hypothesize that its purpose is to cool the brain. ... mouth and sinus passages. Theories of Yawning ...

Humans yawn from their earliest days–even babies still inside the womb can yawn. Photo by Flickr user Björn Rixman Snakes and fish do it. Cats and dogs do it. Even human babies do it inside the ...

Yawning has puzzled scientists for more than two millennia. ... like closing the lips, ... triggering a rush of oxygen into the blood supply, ...

First, yawning increases blood flow to the brain and enhances blood flow back to the heart. Second, the deep inhalation of air during a yawn is thought to cool blood in vessels in the nose and mouth.

Yawning is an involuntary reflex where you open your mouth with maximal widening of the jaw, ... studies have shown that ...

Experts explain why we yawn, specifically why it’s associated with boredom. They also explain other biological functions yawning is believed to serve.

On the other hand, 48 percent of mouth breathers yawned after watching video of others yawning. In their study, the researchers pointed to evidence that the blood vessels in the nasal cavity send ...

And that wide-open mouth can be contagious, especially in social species such as humans, chimpanzees, bonobos, macaques and wolves.. Watching someone yawn – heck, even reading about yawns ...

“Yawning, avoiding eye contact, licking their lips, sniffing something in the environment, and exaggerated slow walking are all ways [dogs communicate] that…they’re not a threat,” Dr ...