An astronaut’s mystery illness could change the way NASA plans future missions - CNN

Veteran NASA astronaut Mike Fincke suddenly lost the ability to speak while aboard the International Space Station, prompting the station's first-ever early return for a medical reason. Doctors have run tests but have not identified a definitive cause, leaving the episode unexplained. The incident has prompted renewed attention to medical monitoring, diagnostics, evacuation policies and crew risk planning for future deep-space missions, and other coverage of the case similarly notes the unresolved diagnosis.