Human factors are a key component to the success of long-term space missions such as those necessitated by the human exploration of Mars and the development of bioregenerative and eventually self-sufficient life support systems for permanent space outposts. Observations by participants living inside the 1991-1993 Biosphere 2 closed system experiment provide the following insights. (1) Crew members should be involved in the design and construction of their life support systems to gain maximum knowledge about the systems. (2) Individuals living in closed life support systems should expect a process of physiological and psychological adaptation to their new environment. (3) Far from simply being a workplace, the participants in such extended missions will discover the importance of creating a cohesive and satisfying life style. (4) The crew will be dependent on the use of varied crops to create satisfying cuisine, a social life with sufficient outlets of expression such as art and music, and to have down-time from purely task-driven work. (5) The success of the Biosphere 2 first 2-year mission suggests that crews with high cultural diversity, high commitment to task, and work democracy principles for individual responsibility may increase the probability of both mission success and personal satisfaction. (6) Remaining challenges are many, including the need for far more comprehensive real-time modeling and information systems (a "cybersphere") operating to provide real-time data necessary for decision-making in a complex life support system. (7) And, the aim will be to create a noosphere, or sphere of intelligence, where the people and their living systems are in sustainable balance.
Mars On Earth® (MOE) is a demonstration/research project that will develop systems for maintaining 4 people in a sustainable (bioregenerative) life support system on Mars. The overall design will address not only the functional requirements for maintaining long term human habitation in a sustainable artificial environment, but the aesthetic need for beauty and nutritional/psychological importance of a diversity of foods which has been noticeably lacking in most space settlement designs. Key features selected for the Mars On Earth® life support system build on the experience of operating Biosphere 2 as a closed ecological system facility from 1991-1994, its smaller 400 cubic meter test module and Laboratory Biosphere, a cylindrical steel chamber with horizontal axis 3.68 meters long and 3.65 meters in diameter. Future Mars On Earth® agriculture/atmospheric research will include: determining optimal light levels for growth of a variety of crops, energy trade-offs for agriculture (e.g. light intensity vs. required area), optimal design of soil-based agriculture/horticulture systems, strategies for safe re-use of human waste products, and maintaining atmospheric balance between people, plants and soils.
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