The Reason We Yawn Might Might Be to Cool Down Our Brains What makes yawning so contagious? Why do we yawn? Could it be to cool our hot brains? Facebook Prev Article Next Article Discover Checkout these cool gadgets... Related Posts How to Make First Contact Why Do We Blink? The Largest Electrical Current in the Universe Here’s how an Oscar is made Why We Have Pain and How We Kill It How smart is today’s artificial intelligence?