What Is A Yawn?

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The yawning behind science is pretty surprising. Can you make it through this video without letting out a yawn?
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[@cia5791]

0:25 i yawned because of a cartoon

[@mikeytaylorjr]

Jesus i yawned like 60 times. I'm even yawning right now as I'm typing this

[@IDaniel40]

just as you started the sentence about sneezing...... i fukn sneezed this video= illuminati confirmed

[@bloodandwinearered]

Yes, I yawned during this video. I am very susceptible to the contagion.

[@husainalaa99]

Who thought that was Lacy's voice!!??

[@chaquator]

more research is needed

[@humberto5037]

Lmao, I yawned whilst reading the title.

[@devon.mooring]

Every time you said the word yawn I yawned

[@lawlessturner]

I totally yawn during this video! Thanks for teaching me something cool and new :)

[@phillipbrewster6058]

I was yawning a lot before this video ever started, that's why I looked it up!!

[@momentsinminutes4032]

Great videos! Keep up the great content!

[@connorandnickproductions651]

I yawned liked 15 times during this video

[@justinmitchell9949]

I yawned almost 6 times just watching this video

[@sizanogreen9900]

I yawned 4 times during the video... yes I counted it :P

[@Julio9491]

The yawning behind science? Did you guys mean the science behind yawning?

[@TheWaydeReview]

Hey animals, I yawn in front of my mom when she's worried about me cuz I know I'm taking in the advice she's given me and compartmentalizing it in the best way possible :)

[@mohammadnassar7824]

I yawned just by reading the video tittle

[@jugalicious123]

Just reading the word Yawn itself makes me yawn

[@sunshineflicker6120]

This explains why I always starts yawning while working out after a long and intense day in school. Also, I did not yawn wile watching this video... Am I a bad person?!

[@angrydognr1]

so I didn't yawn, guess I'm empty inside.

[@luancalegari]

Hey guys! Very nice video! But I was wondering, from where did you get the information that the brain use 40% of the body metabolic energy? I'm a biologist and I already saw about 20% to 25% of energy consumption. I think 40% is too high. Thanks!

[@TheInfo3]

I yawned 3 times one at the intro and two during the video

[@12315yh]

Yeah I started taking antidepressants and it makes me yawn all day

[@WhiskeyGuide]

A yawn is alertness slowly leaving your body. duh.

[@dmbkersh]

This got me twice.

[@Blayk133]

....im pretty sure yawning is just your lungs stretching? Like when you stretch your joints, it normally comes with some kind of join stretch and deffinately feel my lungs stretching when i yawn, more than i feel my brain getting cooler thats for sure haha so kinda makes sense unless thats just me and yawning varies more in different people than i think, im sure some keyboard warrior will oh so 'subtly' let me know if this is the case haha

[@rickgrendel1]

I yawned 3 times lol

[@AJarOfYams]

337+ people yawned to this.

[@ivo3185]

My yawns are exhales... what?

[@Karmiangod]

I yawn when I'm tired.

[@modus9686]

I yawned twice but I didn't mean to be nice

[@noone7219]

i yawned twice

[@larsiparsii]

I yawned three times! ^_^

[@triniwarrior16]

Wait! A Natural Yawn or a fake one

[@Korn9411]

I yawned like 5 times

[@jaysilva5731]

Who else yawned because of this video

[@presonama2570]

i yawned

[@IbrahimShahKhan]

The cartoon made me yawn

[@elikobain6185]

I didn't yawn at all wtf am I broken?

[@CCcrafted]

5 times I yawned, and it's annoying me

[@KamiltheCamel]

Brain is machine confirmed machines get to hot and need a fan brain needs to cool off too

[@randomstuff4344]

yes i did

[@yamjamjam]

I also yawned!!!

[@onlethebest]

I did

[@gladiaattori2011]

Yawned 3 times

[@LovleshKishun]

I yawned 4 times

[@CeejARama]

I yawned in the video after he puppy

[@ribarxlittlex]

Yes 2 times

[@BigBossGator]

This is mostly bull shit, folderol, bosh, flimshaw.

[@thiccityd9773]

I only ever yawn when I am thinking about yawning. I yawned 2 times writing this comment.