The Yawn O Meter ( How Long Can You Last )

Find out why we yawn: How long can you last before yawning Let us know in the comments And SUBSCRIBE : Instagram: Greg s and Mitch s Facebook: Twitter: Tumblr: Vine: Search AsapSCIENCE on vine Written and created by Mitchell Moffit (twitter mitchellmoffit) and Gregory Brown (twitter whalewatchmeplz).