Another hypothesis is that contagious yawning evolved to keep groups in sync. Yawns follow a natural circadian rhythm and often signal transitions between activities. So, when yawning spreads within a ...

New research on chimpanzees by a British team of cognitive scientists shows contagious yawning is not only common in other species, and can happen between species, but that it can also be induced in ...

Yawning seems like such a simple act, yet it holds surprising power over us. Just watching someone yawn — even a stranger — can suddenly trigger the. ... Children under 4, for example, ...

Parents are claiming children starting a new school term have been met with "severe punishments" for yawning and not having a sharp enough pencil. Youngsters at Camborne Science and International ...

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 ...