where did they build the structure used in biosphere 2
Biosphere 2 Biosphere 2 is an American Earth system science research facility located in Oracle, Arizona. It has been owned by the University of Arizona since 2011. Its mission is to serve as a center for research, outreach, teaching, and lifelong learning about Earth, its living systems, and its place in the universe. It is a 3.14-acre (1.27-hectare)[1] structure originally built to be an artificial, materially closed ecological system, or vivarium. It remains the largest closed system ever created.[2]
Exploration Mission 2 Originally, the crewed mission was intended to collect samples from a captured asteroid in lunar orbit by the now cancelled robotic Asteroid Redirect Mission.[6] As of April 2018, the plan is for a crewed Orion spacecraft to perform a lunar flyby test and return to Earth.