What does it take to make wild places "work"? Can a South African game park's rhinos behave as they would in the wild? Can bison restore an Oklahoma cattle ranch to prairie status? Research conducted inside Arizona's Biosphere 2 attempts to answer such questions. Reorganized as a climate research institute, Biosphere 2 studies reactions of miniature wild ecosystemsrain forests and coral reefsto the global atmospheres of a century from now.