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
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