Twin Astronauts Volunteer for Yearlong NASA Space Study

May 29, 2014 4:42 PM

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As part of an unprecedented study of zero gravity and weightlessness, identical twin astronauts have volunteered to take part in a yearlong NASA space project.

Retired astronaut Mark Kelly, 50, will stay home on Earth, while his brother Scott will be spending a year aboard the International Space Station beginning next March, planning to break the American record for longest time spent in space, the Associated Press (AP) reported.

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