Distributia
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Janice L. BishopHerself - Sr. Research Scientist, Carl Sagan Center (as Janice Bishop)
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Rosalba BonaccorsiHerself - Research Scientist, Carl Sagan Center
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Nathalie CabrolHerself - Director, Carl Sagan Center
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Alfonso F. DavilaHimself - Research Scientist, Carl Sagan Center (as Davila Alfonso)
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Paul EstradaHimself - Chair, Carl Sagan Center
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Frank MarchisHimself - Principal Investigator, Carl Sagan Center
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David O'BrienNarrator
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Jill TarterHerself - Bernard M. Oliver Chair for SETI