Jack and Dean (Ep 10)12 years ago

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Hannah Hart (Ep 11)12 years ago

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Vsauce - Michael Stevens (Ep 12)12 years ago

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Vsauce - Michael Stevens12 years ago

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Mike Rugnetta of PBS Idea Channel (Ep 13)12 years ago

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Mike Rugnetta of PBS Idea Channel12 years ago

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Oli White (Ep 14)12 years ago

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Oli White12 years ago

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