Why do we yawn? This question has puzzled scientists since time immemorial, but they have not yet been able to find a definitive answer. They have also not been able to confirm exactly why we yawn when we observe a person yawning. Be it live or through the screen. The fact is that yawning is highly contagious. That's why CollegeHumor made a video where they challenge you. Can you watch it without yawning?
Yawning is a rather mysterious phenomenon that has puzzled scientists for as long as we can remember. We all yawn, not just humans, too animals. All day long, a most often before and after sleep. One theory says that you are with it we cool the brain, meanwhile, the theory that we yawn because because the body lacks oxygen. Theory up, theory down, the fact is that science is still wandering in the dark and we still don't know the real reason for yawning, although most of us laymen would (rightly) say that we yawn, when we are tired, sleepy or bored. But even this is not proven, although it seems to hold like a nail.
READ MORE: Is 6 hours of sleep enough? The brain says no!
All we know for sure is that it's a yawn highly contagious (just think how many times you've caught yourself yawning after catching someone else doing it) and you'll realize it all over again in the video by CollegeHumor, in which the host challenges you to watch it without yawning once in between. Do you accept the challenge?
