WeÃ¢â‚¬â„¢ve all let out a big ol' yawnÃ¢â‚¬Â¦ usually in the middle of a long meeting or a phone call with an insufferable aunt. But a giant mouth stretch doesnÃ¢â‚¬â„¢t necessarily mean boredomÃ¢â‚¬”or even sleepiness.
It might just signal winter. According to new research published in the journal Frontiers in Evolutionary Neuroscience, yawning can be a physiological response to cold temperatures.
Why? Letting in a yawn of cool air helps to cool down the brain.
In the study, researchers found that as time spent outside in cold weather increased, so did the likelihood of yawning. But as the time spent outside in warm weather increased, participants were less likely to yawn.
So next time someone calls you out for yawning and looking bored, just tell them to turn up the thermostat.