The BRL is able to closely approximate the unusual time conditions that exist in space. During their stay in the BRL, study participants will be given performance tests so researchers can keep track of their alertness and ability to perform the types of tasks real astronauts need to do and will have their sleep and circadian rhythms measured. Study volunteers, who must be between the ages of 30 and 59, will live in the BRC in groups of two to four individuals for 16 days. Their sleep, body temperature and alertness will be measured. During free time, participants will be able to work on their own projects, read a book or play board games or cards with each other.
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