Music Why Do We Yawn? by DDF - March 12, 2014 0 Source Tags: Always tired, Always Yawning, Animals, asapscience, autism, Awareness, brain, Brain Activity, Brain temperature, breath, breathing, Can't sleep, cartoon, contagious, Cool brain, Copy yawn, drawing, Exhausted, Exhaustion, genetics, hands, insomnia, learning, lungs, Mirror Neuron, neurons, oxygen, science, sleep, Sleep deprivation, Sleeping, Stop motion, temperature, Tired, Whiteboard, Why is yawning contagious?, Yawn, Yawn-O-Meter, Yawning
