Distributia
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Eugene ShoemakerHimself - US Geological Survey (as Gene Shoemaker)
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Nick FinnisHimself - Narrator (voice)
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Tom AhrensHimself - California Institute of Technology
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Peter WardHimself - University of Washington
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Peter SchultzHimself - Brown University
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Buck SharptonHimself - Lunar Planetary Institute
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Alan HildebrandHimself - Geological Survey of Canada
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Kirk JohnsonHimself - Colorado Museum of Natural History