The science behind yawning and its mysterious behavior 03:38. Humans aren't alone when it comes to yawning — all vertebrates do it too, including fish, amphibians, reptiles, birds and mammals ...

People were more likely to yawn in response to someone they were close to, and women were more likely to yawn responsively than men, the researchers report in this week’s Royal Society Open Science.

Yawning may help you keep a cool head—literally, a new study suggests. The findings might hold some hope for sufferers of insomnia, migraines, and even epilepsy. Though scientists have put forth ...

Not everyone is equally susceptible to contagious yawning. In controlled studies, approximately 40% to 60% of typical volunteers yawned in response to watching another person yawn in a video.. A ...

Researchers believe the yawning robot may have triggered some biological mechanism in the chimps that they associated with sleep. Image: Popular Science composite, Getty Images/ RMJM, Aline Sardin ...

Yawning may help cool down the brain. When temperatures in the brain rise above its baseline — because of increases in mental processing while focusing on a task, exercising or being anxious or ...

Yawning, a complex reflex, can happen spontaneously, or it can be contagious — when we see, hear or sometimes even think ...

Does yawning mean our brains aren’t getting enough oxygen? Researchers believe yawning may serve an important physiological purpose. There is no consensus, however, on what that is.