Distributia
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Bob NicholHimself - Prof., University of Portsmouth
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Carlos FrenkHimself - Durham University
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Dan HooperHimself - Prof., University of Chicago
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David O'BrienNarrator
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Katie FreeseHerself - Prof., University of Michigan (as Katherine Freese)
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Juan CollarHimself - Prof., University of Chicago
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David CharltonHimself - Prof., University of Birmingham (as Dave Charlton)
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Katherine LeneyHerself - Prof., University College London