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BioSphere 2

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Ecological test project, a ‘planet in a bottle’, in Arizona, USA. Under a sealed glass and metal dome, different habitats are recreated, with representatives of nearly 4,000 species, to test the effects that various environmental factors have on ecosystems. Simulated ecosystems, or ‘mesocosms’, include savannah, desert, rainforest, marsh, and Caribbean reef. The response of such systems to elevated atmospheric concentrations of carbon dioxide gas (CO 2 ) are among the priorities of Biosphere 2 researchers. BioSphere 1 Experiments with biospheres that contain relatively simple life forms have been carried out for decades, and a 21-day trial period in 1989 that included humans preceded the construction of BS2. However, BS2 is not in fact the second in a series: the Earth is considered to be Biosphere 1. Human inhabitants Originally, people (called ‘Biospherians’) were sealed in the dome. They were self-sufficient, except for electricity, which was supplied by a 3.7-megawatt power station…
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Full text Article BioSphere 2

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Ecological test project, a ‘planet in a bottle’, in Arizona, USA. Under a sealed glass and metal dome, different habitats are recreated, with representatives of nearly 4,000 species, to test the effects that various environmental factors have on ecosystems. Simulated ecosystems, or ‘mesocosms’, …
| 368 words
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Full text Article Biosphere 2

From The Columbia Encyclopedia
privately funded ecological research project in which eight people lived sealed in a 3.15-acre (1.28-hectare) structure for two years (Sept. 26, 1991–Sept. 26, 1993). Located in Oracle, Ariz., about 35 mi (56 km) north of Tucson, and designed to depend on the outside only for electricity and…
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Full text Article Biosphere 2 Centre

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
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Full text Article Tucson

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
City in Pima County in southeast Arizona, USA, on the Santa Cruz and Rillito rivers, 105 km/66 mi north of the Mexican border; population (2000 est) 486,700. It stands 760 m/2,500 ft above sea level in the Sonora Desert; the Santa Catalina Mountains rise to about 2,750 m/9,000 ft to the northeast. …
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The millions of monarch butterflies that return...
Mexico Criteria - Natural phenomena or beauty The Monarch Butterfly Biosphere Reserve protects key overwintering sites for the monarch butterfly whose concentration in the property is a superlative natural phenomenon. The 563 km 2 biosphere lies within rugged forested mountains about 100 km…
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Full text Article Oracle

From Merriam-Webster's Geographical Dictionary
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Full text Article 1991

From The Hutchinson Chronology of World History Full text Article 1991
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Full text Article Santa Catalina Mountains

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
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Full text Article Living with bunker builders: doomsday prepping in the age of coronavirus (May 2020)

From The Conversation: An Independent Source of Analysis from Academic Researchers
Nestled among Kansas cornfields in a landscape devoid of any noticeable natural topography, a verdant mound can be seen from a dirt road. Surrounded by a military-grade chain fence and in the shadow of a large wind turbine, a security guard in camouflage paces the fence line with an assault rifle. …
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Full text Article Biology: key dates

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
BC c. 500 Alcmaeon of Croton carries out the first studies of the structure and behaviour of animals. c. 450 Hippocrates of Kos undertakes the first detailed studies of human anatomy. c. 350 Aristotle lays down the basic philosophy of the biological sciences and outlines a theory of evolution. c. …
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