Interestingly, although yawning is a normal function, why it occurs excessively in some patients with brain damage or with multiple sclerosis is unclear. Answer originally published on August 12 ...

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 ...

The notion that we yawn because our brains need more oxygen, however, is a myth, experts said. A study in the 1980s reported ...

She said Snoopy's "massive yawn" came at just the right moment in the proceedings. She said: "Once he gets bored, he kicks off then, so it was perfect timing.

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 ...

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.

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 ...

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.