character: Dr. Scott Dulchavsky
topic: Impact of microgravity on human physiology during space missions
grade: 9
subject: Science
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character: Dr. Sandra H. Magnus
topic: Physiological changes in astronauts in space environments
grade: 9
subject: Science
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character: Dr. John Olsson
topic: Effects of microgravity on muscle atrophy
grade: 9
subject: Science
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character: Dr. Sian Proctor
topic: Research on bone density loss in space
grade: 9
subject: Science
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