Why Is Yawning Contagious?

Why Do We Yawn?

http://www.twitter.com/Tweetsauce

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

Other peeps in this video:

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

Yawning to cool down your brain: http://well.blogs.nytimes.com/2011/10/03/really-the-claim-yawning-cools-the-brain/

and: http://dsc.discovery.com/news/2008/12/15/yawn-brain-head-02.html

More on yawning and empathy here: http://tlc.howstuffworks.com/family/contagious-yawn.htm

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

and here (for the journal article): http://www.plosone.org/article/info:doi%2F10.1371%2Fjournal.pone.0028472

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

PARAKEET YAWN: http://www.youtube.com/watch?v=nFiT6QaOnZM

BETTA FISH YAWN: http://www.youtube.com/watch?v=FsBTwczonE4

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

“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