This incident highlights the unpredictable health issues that astronauts may face during space missions. On January 7, 2026, astronaut Mike Fincke experienced a sudden 20-minute loss of speech while aboard the International Space Station (ISS), prompting NASA’s first medical evacuation from the facility.

Fincke’s episode occurred while he was preparing for a spacewalk, described by him as happening “out of the blue” and “amazingly quick.” Colleagues reassured him, stating, “This wasn’t you. This was space, right? You didn’t let anybody down.” Following the incident, doctors ruled out heart attack and choking as potential causes.

Fincke had been in space for five and a half months at the time of the episode, which resulted in the cancellation of a planned spacewalk. The space station’s ultrasound machine was utilized during the medical event, and Fincke has since undergone numerous tests after returning to Earth.

NASA is currently reviewing other astronauts’ medical records to determine if any related instances have occurred in space. Fincke expressed surprise at his medical episode, stating, “I’ve been very lucky to be super healthy. So this was very surprising for everyone.” He hopes to return to space in the future.

Fincke’s evacuation involved four astronauts in the return capsule, and he returned to Earth on January 15, 2026, after the incident. The exact cause of his medical episode remains unclear, and details remain unconfirmed.

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