When American astronaut Scott Kelly went into space last March, he went to learn more about space, but now that he's back, he's the main experiment.Science has long been fascinated with the strange and mysterious effects that outer space has on living organisms and especially human beings. Aside from the air we breathe and the food we eat, what conditions on Earth make life so favorable, and what does removing ourselves from these resources and entering the vacuum of space do to our minds and bodies?Scott Kelly made the perfect test because he has a twin brother, former astronaut Mark Kelly, who remained on Earth to serve as a a control. Now that Scott's time in space is through, the changes have turned out to be fascinating.
Source: Twitter @pillownaut
Here's what we've learned after Scott Kelly's record-breaking year in space.