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Charles Fuller, professor of neurobiology, physiology and behavior and chair of exercise biology at ºÙºÙÊÓƵ, can discuss the potential health effects of long space journeys and of living on the moon and Mars. Such missions will expose astronauts to long periods of reduced or near-zero gravity that cause changes in bone, muscle and blood circulation. Fuller's research has shown that different gravity environments also affect the body's biological clock and result in long-term changes in body fat, appetite, heart rate and the body's ability to regulate temperature. Fuller has worked with both the U.S. and Russian space programs to study the health effects of space travel.