NASA @NASA
To understand the impacts of spaceflight, we compared identical twin astronauts — @StationCDRKelly who spent a #YearInSpace & @ShuttleCDRKelly who remained on Earth. 👨🚀 Discover what our experts learned as we release results of our Twins Study tomorrow: https://t.co/O7yU0K7q3w https://t.co/nLhhuTJqNd — PolitiTweet.org