Why do we yawn? It’s a question that has long baffled scientists, but new research is beginning to shed light on this seemingly simple act.
When we yawn, our breathing deepens and our heart rate slows. This combination of events is thought to help us regulate our body temperature.
In a recent study, researchers used thermal imaging to show that when we yawn, the air we inhale cools the blood vessels in our face. This process helps to keep our brain cool and functioning at its best.
So why do we yawn when we’re tired? It’s likely that when we’re tired, our body temperature rises and we need to yawn to cool down.
Yawning is also contagious. When we see someone else yawn, we’re more likely to yawn ourselves. This is because yawning is a social signal that helps us to bond with others.
So next time you yawn, take a moment to appreciate the science behind it!