Forever Wild?

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For nearly 10,000 years, the Earth's wild places have been replaced by agricultural landscapes - an occurrence that has left a single question in its wake: where are the wild things? In Forever Wild, a part of the PBS Scientific Frontiers series, host Alan Alda goes behind the scenes with forest and wild life advocates as they examine the questions brought about by a domesticated world: 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? Alda also visits Arizona's Biosphere 2, a climate research institute, studying reactions of miniature wild ecosystems to the global atmospheres - a century into the future.