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He suddenly couldn't speak in space. NASA astronaut says his medical scare remains a mystery

By Phys.org · 2026-03-27
He suddenly couldn't speak in space. NASA astronaut says his medical scare remains a mystery
Why it matters: This unexplained medical event highlights critical unknowns about human health in long-duration spaceflight.
NASA astronaut Mike Fincke experienced a sudden, unexplained medical emergency in space, losing his ability to speak for 20 minutes, prompting the agency's first medical evacuation from the International Space Station. Despite extensive tests, doctors remain baffled by the incident, which Fincke describes as a "lightning bolt" that struck without warning.

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