Distributia
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Michio KakuHimself - Teoretical Physicist
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Richard LinternHimself - Narrator
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Mike RoweHimself - Narrator (voice) (as Erik Todd Dellums)
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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
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Alex FilippenkoHimself - Astrophysicist