Yawning cools your brain: study


People yawned almost twice as much in winter, when their body temperature was higher than the air around them.

The brain is like a computer and works best when it is cool, but putting too great a strain on it can lead to overheating which reduces its ability to process information. Yawning is not just a sign of tiredness or boredom – it is the body’s method of keeping our brain cool, scientists have found.