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  2. Ask Dr. Nandi: Why is yawning so contagious?

    Ask Dr. Nandi: Why is yawning so contagious?

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  4. The big tiger snorted，I've heard that yawning is contagious

    The big tiger snorted，I've heard that yawning is contagious

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  5. The big tiger snorted，I've heard that yawning is contagious

    The big tiger snorted，I've heard that yawning is contagious

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  7. Why is Yawning Contagious??

    Why is Yawning Contagious??

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  10. 19_ Yawning is actually contagious

    19_ Yawning is actually contagious

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  11. Pet dog 'catches' human yawn

    Pet dog 'catches' human yawn

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  13. Yawning is contagious, even from humans to dogs. Confirmed theory...

    Yawning is contagious, even from humans to dogs. Confirmed theory...

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  14. LION YAWNING FOR 20 SECONDS STRAIGHT!! CRAZY FOOTAGE TAKEN ALL BY MY DAD! Paradise Wildlife Park!!

    LION YAWNING FOR 20 SECONDS STRAIGHT!! CRAZY FOOTAGE TAKEN ALL BY MY DAD! Paradise Wildlife Park!!

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  16. cat's contagious yawn| cat yawning will make you yawn

    cat's contagious yawn| cat yawning will make you yawn

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  18. Contagious Farting

    Contagious Farting

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  25. cute dogs

    cute dogs

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