Fun Fact April 2, 2020.
2 April 2020
Hopefully you won’t yawn during this fun fact, but chances are you will. I hope I can make it through this without yawning. Yawning is contagious. If we see, hear or even read about yawning it isn’t long until we are also yawning. Contagious yawning has also been observed in chimpanzees, dogs, cats, birds and reptiles and can even occur between members of different species. If I see my dog Sasha yawn, it won’t be long until I too am yawning, and visa versa. Yawning can be a sign of boredom, stress or even hunger, but in most cases we yawn due to downiness. The exact reason we yawn is still unknown, mostly because not much research has been devoted to it. Probably because it makes all the researchers yawn. Some of the research that has been done indicates that we yawn to cool off our brain. When our brain heats up, a yawn is triggered and within a couple of minutes the brain temperature drops, at least it did in the rats that were being observing. Another theory is that we yawn when our brain needs more oxygen. As we inhale a big deep breath of fresh air and slowly exhale our blood stream is enriched with a big dose of oxygen from the lungs. In most cases a good stretch accompanies big yawn. On average, a human will yawn around 250 thousand times in their lifetime. You would be surprised how many times I yawned as I was typing this.