Every time you yawn or see your colleague doing so, we usually associate it with a lack of sleep. Yawning is generally associated with boredom, tiredness and is a least understood behavior. But a hypothesis says that yawning helps keep the brain at a cool temperature. The researchers found that yawning was triggered when there was a subtle increase in the brain temperature of approximately 0.1 degree Celsius. We yawn unconsciously; we can’t yawn on command. We can’t even stop ourselves from letting out a big yawn, though we might want to. Due to too much stress and anxiety our brain gets hotter, by yawning the cooler air we inhale helps lower the brain temperature. You might want to try keeping the temperature of your conference room cool to see if the brain-cooling theory works.

Read more about the study on Wall street Journal.