U.S. astronaut twins to help NASA study body change in space

May 29, 2014 1:40 PM

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CAPE, CANAVERAL FLORIDA – Astronauts Scott and Mark Kelly will take part in an unprecedented study of identical twins to understand better the effects of prolonged weightlessness by comparing the twin in space with the twin on the ground.

When Scott Kelly embarks on a one-year space station stint next spring, his twin brother and retired astronaut Mark Kelly will be joining in from Earth, undergoing medical testing before, during and after his brother’s American-record-setting flight. Mark Kelly draws the line, though, at mimicking h...

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