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Person

Sergei Krikalev

A person wearing a white spacesuit with mission patches, including one featuring the NASA logo, stands against a dark background.

Russian cosmonaut (born 1958) who logged 803 days in space across six missions to Mir and the International Space Station between 1988 and 2005. His cumulative time at orbital velocity makes him the human who has travelled furthest into the future via velocity-induced time dilation — about 0.02 seconds — a distinction unlikely to be broken until long-duration missions to Mars.

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