Biosphere 2 is a 3.15-acre structure originally built to be a man-made, materially-closed ecological system in Oracle, Arizona by Space Biosphere Ventures, a joint venture whose principal officers were John P. Allen, inventor and Executive Director, and Margret Augustine, CEO. Constructed between 1987 and 1991, it was used to explore the complex web of interactions within life systems in a structure that included five areas based on natural biomes and an agricultural area and human living/working space to study the interactions between humans, farming and technology with the rest of nature. On June 26, 2007, the University of Arizona announced it would take over research at the Biosphere 2. The announcement ended immediate fears that the famous glass vivarium would be demolished. University officials said private gifts and grants enabled them to cover research and operating costs for three years with the possibility of extending that funding for 10 years.
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