character: Astronaut Mark Vande Hei
topic: Microgravity Effects on Human Physiology
grade: 9
subject: Science
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character: Dr. Jessica Meir
topic: Muscle Atrophy in Space
grade: 9
subject: Science
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character: Dr. Scott Parazynski
topic: Bone Density Loss in Microgravity
grade: 9
subject: Science
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character: NASA Scientist
topic: Fluid Redistribution in Microgravity
grade: 9
subject: Science
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