Distributia
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Erik DellumsHimself - Narrator (voice) (as Erik Todd Delums)
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Richard LinternHimself - Narrator
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Mike RoweHimself - Narrator
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Andrew J.S. HamiltonHimself - Theoretical Physicist (as Andrew Hamilton)
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Phil PlaitHimself - Astronomer
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Max TegmarkHimself - Theoretical Physicist
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Lawrence KraussHimself - Cosmologist (as Lawrence M Krauss)
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Michelle ThallerHerself - Astronomer