After a year in space, Scott Kelly returns 2 inches taller
NASA astronaut Scott Kelly returned to the U.S. on Thursday after spending nearly a year in space.
Now that Kelly is home, his journey is just beginning. Scott Kelly's year in space was part of a NASA twin study involving his brother, Mark Kelly.
While Scott was in space, Mark remained earthbound, which will allow scientists to study the effects of space travel on the human body in preparation for a crewed mission to Mars. Specifically, NASA is looking at the effects of space radiation, as well as the effect of long-term isolation on mental health.
So what can a year in space do to the... read more
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