We know that time in space affects our bodies, from our brains to our bones, but scientists are still not clear on the details.
scans of 30 astronauts, the researchers built on those earlier studies to discover that the longer the spaceflight, the greater the increase in ventricle size – up to six months or so, where the rate of change seems to plateau.
"Although it seems counterintuitive that there would be a greater change in this structure for shorter missions, this may reflect an early, adaptive structural change in-flight that gradually returns to baseline over time," the researchersFor the seven astronauts who had a break of less than three years between missions, this ventricle expansion wasn't as prominent.
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