Bisophere 2 was an immensely complex project, with numerous goals. Maybe that was part of its problem. <br /><br />There was the construction of a completely closed bisphere. A major engineering challenge in itself.<br /><br />Then there was the goal of inlcuding minatures of all the earth's major biomes in the structure (oceans, deserts, rain forest, grassland, etc.) within the structure. This too was achieved.<br /><br />Then there was the project of running the whole thing as a fully closed system for 2 years as an exercise in ecological engineering. This was very difficult exercise and they were 99% successful in it. <br /><br />Then there was the investigation of the relevance this technology as for space settlements. The problem was the system was almost certainly too complex and labour intensive for initial space applications (which is where the more modest Russian BIOS experiments succeeded.<br /><br />There were two crews. The first crew battled ant plagues, crop failure, and an unexplained loss of oxygen for two years. Only when oxygen levels had fallen to below safe limits was a small amount pumped in to keep them alive. Eventually the problem was traced to the consumption of O2 by still curing concrete. This was all in all a very successful and instructive experiment. However because it did not achieve 100% closure the media began to redicule the project. (the media seem to have wanted to see people die in the name of experimental purity) <br /><br />What happened with the 2nd crew is more murky. There were allegations of mismanagement, secret supplies being smuggled in, and high levels of interpersonal conflict. and the experiment was abandoned. These were all grist to the media mill and the wholr porject became alaughing stock. there were even allegations that it was a front for some cult.<br /><br />The facilty was then managed for over 8 years by Columbia university for research into specific ecological questions, and did quite bit of interesting <div class="Discussion_UserSignature"> <p><em>Whether we become a multi-planet species with unlimited horizons, or are forever confined to Earth will be decided in the twenty-first century amid the vast plains, rugged canyons and lofty mountains of Mars</em> Arthur Clarke</p> </div>