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When was construction of Biosphere 2 completed?
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Biosphere 2
Biosphere 2, located in Oracle, Arizona, U.S., shown in 2008. The facility was originally developed to study survivability and assess whether humans were capable of building and living in self-sustaining colonies in outer space. It was later used as a scientific research facility.
Construction of Biosphere 2, a scientific research facility located in Oracle, Arizona, was completed in 1989.1