Astronaut Scott Kelly now 2 inches taller after year in Space

Astronaut Scott Kelly is back on Earth after spending a year in Space and he returns, physically, a different man. NASA officials say Kelly grew 2 inches while living on the International Space Station for nearly a year. 

A plane carrying Kelly touched down in Houston early Thursday morning and he was greeted with a hero's welcome.  Kelly's family was there to welcome him back along with top NASA officials, his twin brother, and the wife of Vice President Joe Biden. 

When Kelly returned he addressed the crowd saying, "It's great to be back in Texas in the U.S., on U.S. soil.  It's just an unbelievable feeling to be back here on planet Earth, back in our great country and back with all my family and my friends."

Kelly was the subject of dozens of experiments while at the International Space Station and those experiments are designed to help NASA develop plans for eventual human missions to Mars. 

Scott Kelly and his twin brother are participating in a study to figure out if genetic changes happen during long space flights.


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