While JD Vance enjoys a Disneyland vacation with his family, Gavin Newsom makes fun of said vacation by commenting “Probably ...

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 ...

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 ...