What makes yawning so contagious?
Watch the 'Yawn-O-Meter':
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Written and created by Mitchell Moffit (twitter @mitchellmoffit) and Gregory Brown (twitter @whalewatchmeplz).
Further Reading --
Yawning as a Brain Cooling Mechanism:
Chimpanzees and contagious yawning:
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Familiarity-connected or stress-based contagious yawning in domestic dogs:
Contagious yawning, social cognition, and arousal: an investigation of the processes underlying shelter dogs' responses to human yawns:
The thermoregulatory theory of yawning:
Male yawning is more contagious than female yawning among chimpanzees:
Mirror neuron activity during contagious yawning--an fMRI study:
Thermoregulatory theory of yawning:
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