character: NASA Scientist
topic: Research on Human Physiology in Space Environments
grade: 9
subject: Science
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character: Dr. David S. McKay
topic: Effects of Microgravity on Human Physiology
grade: 9
subject: Science
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character: Dr. Sunita Williams
topic: Human Adaptation to Space Travel
grade: 9
subject: Science
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character: Dr. Scott Kelly
topic: Long-term Spaceflight and Human Health
grade: 9
subject: Science
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