Distributia
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William J. BirnesHimself - Author
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David BrinHimself - Physicist and Science Fiction Author
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Erik DellumsNarrator (as Erik Todd Dellums)
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Kevin R. GrazierHimself - Planetary Scientist (as Kevin Grazier)
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Mike BakerHimself - Ex-CIA Covert Operations Officer
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Jacqui JerasHerself - Meteorologist
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Pascal LeeHimself - Planetary Scientist
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Todd HoeksemaHimself - Astronomer (as J. Todd Hoeksema)
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Becky FerreiraHerself - Science Writer
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Joe GutheinzHimself - Former NASA Senior Special Agent
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Tom NicholsHimself - National Security Analyst
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David AguilarHimself - Author & Astronomer
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Richard JurekHimself - Space Historian / Author
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Slava GerovitchHimself - Phd., Soviet Historian
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Sarah BallardHerself - Exo-Planetary Scientist