Butch Wilmore and Sunita Williams join more than a dozen astronauts who’ve been stranded in space by mechanics, weather or geopolitics since the 1970s.| Science News
MRI scans of astronauts show that duration in space and time between flights affect how much the brain’s fluid-filled cavities expand during missions.| Science News
Astronauts undergo many adaptations during space expeditions. NASA is collecting a set of consistent core measurements, called Spaceflight Standard| NASA