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Twins Study

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Discover the Science Goals

The landmark Twins Study brought ten research teams around the country together to observe what physiological, molecular, and cognitive changes could happen to a human from exposure to spaceflight. This was accomplished by comparing retired astronaut Scott Kelly while he was in space, to his identical twin brother, retired astronaut Mark Kelly, who remained on Earth. Click below to learn more about the goals of the study.

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NASA’s Twins Study Results Published

NASA’s trailblazing Twins Study moved into the final stages of integrated research with the release of a combined summary paper…

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Stay up-to-date with the latest Twins Study content.

Follow the Blood: NASA labs process astronaut blood for Twins Study
6 min read

Blood samples from astronaut Scott Kelly taken during his one year mission in space arrived in the lab of NASA’s…

Article
NASA’s Twins Study Results Published
9 min read

NASA’s trailblazing Twins Study moved into the final stages of integrated research with the release of a combined summary paper…

Article
Fireworks in Space: NASA’s Twins Study Explores Gene Expression
3 min read

NASA’s Twins Study preliminary results have revealed that space travel causes an increase in methylation, the process of turning genes on…

Article