Biosphere 2 is basically an Earth system science research facility located in Oracle, Arizona that serves as a center for research, outreach, teaching, and lifelong learning about the planet, its living systems, and its place in the universe. The 3.14-acre structure remains the largest closed system ever created. Unfortunately, it was only used twice for its original intended purposes as a closed-system experiment: once from 1991 to 1993, and the second time from March to September 1994. Continue reading for two more videos and additional information.
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