NASA study reveals changes for twins Scott, Mark Kelly

Astronaut twins Scott and Mark Kelly, of West Orange, helped NASA determine just how stressful a trip to Mars may actually be on the human body.



Scott returned home last March after nearly one year at the International Space Station while his identical twin brother remained on Earth. 



When Scott returned to Earth, he was 2 inches taller, and the level of chemical DNA modification had slowed while in space.



In addition, his bone formation slowed and Scott's cognitive abilities in speed and accuracy slowed.



More information about the study can be found at the NASA website.


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