In 1991, eight people embarked on a two-year experiment to create a completely enclosed, self-sustaining ecosystem in a domed research facility in Arizona. Inside the dome, there was a man-made savannah. A rainforest. A farm. An ocean with tropical coral reef. And all of these habitats would be populated with life. Things did not go according to plan. But was it a failure? EDITOR'S NOTE: one instance of explicit language.Learn more about your ad choices. Visit podcastchoices.com/adchoices