Why Is Yawning Contagious?

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Vsauce SHIRTS: http://www.districtlines.com/vsauce

Other peeps in this video:

Charlie: http://www.youtube.com/charlieissocoo...
Alex: http://www.youtube.com/nerimon

Yawning to cool down your brain: http://well.blogs.nytimes.com/2011/10...

and: http://dsc.discovery.com/news/2008/12...

More on yawning and empathy here: http://tlc.howstuffworks.com/family/c...

here: http://news.bbc.co.uk/1/hi/6988155.stm

and here (for the journal article): http://www.plosone.org/article/info:d...

Angry Mob play-set (no longer available): http://www.neatoshop.com/product/Angr...

PARAKEET YAWN: http://www.youtube.com/watch?v=nFiT6Q...

BETTA FISH YAWN: http://www.youtube.com/watch?v=FsBTwc...

SNAKE YAWN: http://www.youtube.com/watch?v=Fhfss_...

"Why Are Yawns Contagious" "Why is yawning Contagious" "why do we yawn"

Music by Jake Chudnow: http://www.soundcloud.com/JAKECHUDNOW

intro animation by http://www.youtube.com/rickonami

• Category

  Science & Technology

[Calvin Krochock]

STOP MAKING ME YAWN

[TheKazyProductions]

I yawned 13 times during this video

[kelsey4548]

I have yawned at least 20 times. Even thinking about yawning or reading the word "yawn" makes me. I must have lots of empathy.

[Zayeb Chowdhury]

I lost count of me yaughing after the first 10 times

[Samura1gamer]

jesus must have been yawning all day long between the miracles

[FromMuToYou]

Only yawned twice. Oops and a third time as I started typing this.

Do I lack empathy then?

[Derek Granado]

I yawned 6 times while watching this.

[ben V]

the parakeet made me yawn too

[ben V]

i yawned during the commercial before the video ;S

[Henry Blackman]

i literally yawned about 10 times while watching this vid. Thanks VSAUSE! Your videos are always great!

[XchampionXFTW]

Thumbs up if you yawned in the first 30 seconds XD

[Leo Crnogorcevic]

I hate it when I can't finish a yawn