8 Weird Things That Happen To Your Body If You Live In Space For A Year

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In the name of science, former NASA astronaut Scott Kelly shoved himself into the top of a rocket, accelerated to 17,500 mph, and fell around Earth for 340 days — nearly an entire year. The lack of gravity, radiation exposure, Kelly's diet, and other facts of life in orbit affected his body in significant ways — including, as NASA is learning now, even perhaps his genetic blueprint.

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The Twin Study, which is still in progress, uses Scott Kelly's identical twin brother and fellow former astronaut, Mark Kelly, to unmask the subtle but important effects of long-duration space travel on the human body. Here are eight biological oddities that researchers have found happen to your body if you're in space for a year.

Your face looks different.
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Your bone density can change.
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Your body fluids shift.
 

Your sight could change.
 

Your muscles can atrophy.
 

You'll be sleepy.
 

Your cancer risk increases.
 

You get taller — until you get back to Earth.
 

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