The Lost History of One of the World’s Strangest Science Experiments – by Carl Zimmer – The New York Times

“. . . The scientists Joel Cohen and David Tilman wrote, “No one yet knows how to engineer systems that provide humans with the life-supporting services that natural ecosystems produce for free.”

But it would be a mistake to dismiss Biosphere 2 out of hand. For two years, eight people grew papayas, beets, bananas, rice and a host of other crops in there. Except for a sliced finger, their health remained good. The water they drank didn’t poison them. Some species went extinct, but the ecosystems endured. Biosphere 2 did not turn to slime.

As a piece of scientific research, Biosphere 2 had its problems. Countless things were happening all at once inside its walls, making it hard to pinpoint causes and effects. And without any other biospheres to compare it to, there was no way to distinguish random flukes from significant patterns. The University of Arizona scientist Bob Fry summed it up well in a newspaper interview: “It’s an experiment, but only in the sense that life is an experiment.” “