Threshing wheat in Biosphere 2

Threshing wheat in Biosphere 2

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Caption: Dr. Roy Walford, crew physician, threshing wheat inside Biosphere 2. Biosphere 2 was a privately funded experiment, designed to investigate the way in which humans interact with a small self-sufficient ecological environment, and to look at possibilities for future planetary colonization. The US$30 million Biosphere covers 2.5 acres near Tucson, Arizona, and was entirely self-contained. The eight "Biospherians" shared their air- and water-tight world with 3,800 species of plant and animal life. The project had problems with oxygen levels and food supply, and has been criticized over its scientific validity. Photographed in 1990.

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Keywords: 1900s, 1990, 20th century, american, arizona, artificial habitat, biome, biosphere 2, biosphere project, colony, controversial, crop, doctor, ecosystem, environment, environmental science, experiment, experimental, exploration, food, futuristic, laboratory, looking at camera, male, man, north america, north american, one person, physician, pseudo-science, research facility, roy walford, self contained, self-contained, threshing, united states, usa, wheat

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