Yawning is a complex reflex that may be triggered by changes in state of being, but its purpose is still unknown.

Clenching your jaw is an easy and convenient exercise to begin strengthening your masseter muscle. Simply close your mouth ...

Think of a cartoon character starting their day with a hyperbolically large yawn, complete with outstretched arms and a gaping mouth. State change isn’t the only known cause though. Research ...

Yawning is defined in ethology as “an involuntary action that begins with a slow opening of the mouth with inhalation, followed by a maximum gaping phase, and ends with a short exhalation and th ...

Are you yawning yet? Thought so. Infectious yawns are as frustrating as they are intriguing. Sometimes it's enough to need to see someone yawn, hear them talk about it or even read about it for ...

The video recordings, owned by Mikurajima island’s tourism association, showed that dolphin yawning is not “captive-specific,” the team said. In 94 cases, the dolphins exhibited open-mouth ...