paperbiosphere experiment tucsonShare on FacebookShare on Twitter334IMAGESTucson's Biosphere 2 LessonsExplore Biosphere 2: A Mars Colonization Experiment on Earth1991-1993: Biosphere II's grand experimentBiosphere 2 Tucson- Everything You Need to Know Before You GoExploring University of Arizona's Biosphere 2 in Tucson, ArizonaBiosphere 2 Tucson- Everything You Need to Know Before You Go
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