Imagine: four men and four women lock themselves into a three-acre greenhouse in the Arizona desert where they live for two years, completely cut off from the outside world. Nothing in or out - no food, no water, not even air. They produce everything they need to survive from their miniature rainforest, savannah, desert, marsh, ocean and farm. This was the scenario an extraordinary collection of personalities tried to make reality.<BR>Scientists said it was impossible. Countless reports called it a fraud. But Time put the project on its list of Best Science, and its breakthroughs in understanding the global climate crisis are more significant and relevant than ever.<BR>Now, for the first time, one of those original crewmembers tells the extraordinary tale of Biosphere 2. Jane Poynter, who helped develop the project, lived, and loved in it - and ultimately walked away from it - at last shares the reality of what life was like inside a glass cage.