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This biome facility close to Tucson, Arizona owned and run by the University of Arizona houses a rainforest, an ocean with a coral reef, a mangrove wetlands, a savannah grassland, a desert, an agricultural system, a human habitat, and a below-ground infrastructure. Back in 1991, they conducted an experiment where 6 people were sealed inside for two years living on their own and conducting experiments as a precursor to a Mars mission. We visited the facilities where they conducted a very interesting and educational tour. Now as for Biosphere 1? Well, it’s the Earth herself!

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