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How tall is the main glass enclosure at Biosphere 2?
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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.
The main aboveground glass enclosure at Biosphere 2 reaches a height of 27.7 metres (91 feet) at its highest point.1