The Yawn-O-Meter (How Long Can You Last?)

Find out why we yawn: http://bit.ly/1glgLOO
How long can you last before yawning? Let us know in the comments! And SUBSCRIBE!: http://bit.ly/10kWnZ7

Instagram: Greg's (http://bit.ly/16F1jeC) and Mitch's (http://bit.ly/15J7ube)
Facebook: http://on.fb.me/1fjWszw
Twitter: http://bit.ly/1d84R71
Tumblr: http://bit.ly/1amIPjF
Vine: Search "AsapSCIENCE" on vine!

Written and created by Mitchell Moffit (twitter @mitchellmoffit) and Gregory Brown (twitter @whalewatchmeplz).

Sonraki bölüm

S01E86 - What If You Stopped Drinking Water?