In new York, researchers conducted an unusual study.
In order to verify the existence of this relationship, the researchers reviewed 29 videos with people and animals of different species.
Animals with fewer neurons in the cerebral cortex, yawned a lot faster. Those whose nervous system was well developed and spent on a yawn a lot of time. Champions began yawning in primates and elephants, spending one yawn about six seconds. The fastest in this case the mouse. They got one yawn takes only fifteen seconds.
According to scientists, this can be explained by the fact that a large brain requires serious cooling, which is provided by a yawn. Their findings are published in the journal Biology Letters.
