Distributia
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Morgan FreemanHimself - Narrator
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Martin BojowaldHimself - Physicist
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Alan GuthHimself - MIT
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Edwin HubbleHimself - Astronomer (archive footage)
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Arno PenziasHimself - Physicist, radio astronomer (archive footage)
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David SpergelHimself - Princeton University
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Paul SteinhardtHimself - Theoretical physicist, Princeton University
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Neil TorukHimself - Physicist, Perimeter Institute