title: Space colonization.
authors.forename: Clyde F
authors.initials: CF
authors.lastname: Parrish
mesh_terms: D018504:Ecological Systems, Closed; D004867:Equipment Design; D006801:Humans; D008021:Life Support Systems; D018535:Mars; D013026:Space Flight / Q000295:instrumentation / Q000639:trends*; D014195:Travel; D014893:Weightlessness