"The reason it's called Biosphere 2 is because Biosphere 1 is planet Earth, right? The real world," University of Arizona ...

Escape the Arizona heat at this mountain town surrounded by nature. Explore hiking trails with elk and bighorn sheep or ...

Goldwater Bombing Range east of Yuma, Arizona. The 30-foot-tall ... next to Mexico’s El Pinacate y Gran Desierto de Altar Biosphere Reserve, is not a major crossing point for drug smugglers or ...

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A giant 2.2-acre terrarium, Biosphere 2 was hailed as a marvel of modern science - until the scientists who volunteered to live inside it were embroiled in scandalous rumors of sex and deceit.

The 56,259 ha biosphere lies within rugged forested mountains about 100 km northwest of Mexico City. Every autumn, millions, perhaps a billion, butterflies from wide areas of North America return to ...