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peggy whitson
NASA's Christina Koch has spent more consecutive days in space than any other female astronaut.
The 57-year-old trailblazer returned from her third mission to the International Space Station on Saturday.
And she smashed another record just last month.
WHAT'S HAPPENING
She's on her third long-duration mission to the International Space Station.
She's also the first woman to serve as commander of the International Space Station.