Dr. Roberts looks at the Biosphere II project in Arizona, an experiment to test the viability of a totally self-contained and self-sustaining ecosystem. Walter Orr Roberts informal series, "Provocations." Each issue consists of provocative comments related to scientific issues that mostly focus o... Show moreDr. Roberts looks at the Biosphere II project in Arizona, an experiment to test the viability of a totally self-contained and self-sustaining ecosystem. Walter Orr Roberts informal series, "Provocations." Each issue consists of provocative comments related to scientific issues that mostly focus on weather, climate, the sun, or near space, with the aim of creating a forum for discussion. Show less
