Astronaut Scott Kelly Will Test His Limits on Epic One-Year Space Mission

Scott Kelly updates on his year in space mission

By the Numbers: Astronaut Scott Kelly's Year in Space

NASA's twin study shows how space travel affects genes, cognition, aging and gut microbiome

Scott Kelly Spent a Year in Space and Now His DNA Is Different From His Identical Twin’s

7.3K views · 712 reactions | Ever since NASA Astronaut Scott Kelly spent a year living aboard the International Space Station, NASA takes blood from both of us to better understand the long-term effects on the human body for extended periods in space. The “Twins Study” is important research that helps prepare for future missions with long spaceflights, like sending humans to Mars, and I’m happy to do my part to help. | Captain Mark Kelly | Facebook