Why Are Yawns Contagious
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2:53
Why are yawns contagious?by Buttie6013,953 views- 1:12
Medicine not Myth: Contagious Yawnsby abreva647 views
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Why is yawning contagious? The brain and mirror neuronsby anotherlookmedia8,850 views
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Yawning is contagiousby tommotompkins87,675 views
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Episode 1 - Why are yawns contagious?by TheMadShepherd317 views
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Why are yawns contagious?by askkidsanything1,483 views
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February 6, 2010 (Part 1 of 2)by fionatierney69523 views
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Psyche: Yawns are contagiousby Cheenana2,169 views
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Stony Brook University Contagious Yawning Experimentby Flamy999766 views
- 4:29
Yawns Are Contagiousby nickandbristudios1,848 views
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Indiana's Weather Leaderby tvkerryw805 views
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Yawning Contagious Across Species - Caring Creatures Pet Care Newsby caringcreatures751 views
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MythBusters 3x06 Is Yawning Contagious 4/5by ninjaninetyeight11,322 views
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50-Aug 1 2009... Yawning is Contagiousby chaosninja579265,896 views
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Starbucks - Yawning commercialby vinylboy20160,483 views
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yawning is contagiousby lilah78O1,828 views
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Contagious Yawningby indiprincess21952,159 views
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