In 1991 a group of countercultural visionaries built an enormous replica of earth’s ecosystem called Biosphere 2. When eight “biospherians” lived sealed inside, they faced ecological calamities and cult accusations. Their epic adventure is a cautionary tale but also a … John Allen, Tony Burgess, Kathelin Gray, Linda Leigh, Mark Nelson, Roy Walford, Jane Goodall Added on Amazon Prime 2023-07-26. Youtube Trailer