Many of the videos suggest social mirroring, which happens when individuals unintentionally imitate the actions of others, along with empathy, may be why some people yawn when they see others do it ...

Merely thinking about or seeing someone yawn can make you yawn (you’re probably yawning right now). Most people yawn because they’re tired, but it can also happen unexpectedly and without any triggers ...

Ever wondered why yawns are so…contagious? We obviously know what a yawn is, here's a more scientific explanation: "The activity of yawning consists of an involuntary wide opening of the mouth and ...