Yawning is not an indication that you are tired or bored, but rather a violent biological mechanism to physically cool down your overheated brain like a laptop fan kicking into…

Yawning is not an indication that you are tired or bored, but rather a violent biological mechanism to physically cool down your overheated brain like a laptop fan kicking into overdrive, because when you stretch your jaw open and suck in a massive gulp of ambient air, it increases blood flow to the skull and pushes cooler blood toward your incredibly warm neural tissues; studies even show people yawn significantly more often in winter than in summer because the cold outdoor air provides better thermal regulation for their exhausted heads, so the next time you yawn loudly during a boring presentation, you can legitimately claim their tedious monologue caused your highly advanced brain to dangerously overheat!