Mystery medical episode that left NASA astronaut unable to speak highlights major space risk Live ScienceHe suddenly couldn’t speak in space. NASA astronaut says his medical scare remains a mystery AP NewsNASA Astronaut Reveals Terrifying Medical Incident That Caused Evacuation from Space Station FuturismNASA astronaut who was evacuated reveals he couldn’t communicate in space; the reason is unknown. stl.newsAstronaut’s sudden speech loss baffles NASA msn.com
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