Record-Breaking Cosmonaut Polyakov Dies At 80

Russian cosmonaut Valery Polyakov
Credit: Roscosmos
Russian cosmonaut Valery Polyakov, who holds the record for the longest single mission in space at 437 days, died on Sept. 7, Roscosmos Corp. reports. He was 80. Polyakov received a medical degree and joined the Soviet cosmonaut corps in 1972. He was head of the space physician team from 1980 to...

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