This Is What Astronaut Scott Kelly Did While Orbiting the Earth for an Entire Year
Astronaut Scott Kelly was brought safely home last night after spending nearly a year in space. He was primarily in space to study himself to learn about how human bodies change in space. He even has an identical twin who stayed back on Earth to compare results. But what else was he doing for so long up on the International Space Station? He actually kept a pretty good record on Twitter.