Try to get through this video on the science of yawning without yawning

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This video, by vsauce, not only explains why yawning is contagious, but also lays out the physiology of yawning, reveals that you're less likely to yawn when your brain is cool, and gives us some delightful clips of parakeets yawning.

Is it just me, or is anyone else's brain warm right now?

[via Geeks Are Sexy]