NASA twins study reveals long-term spaceflight's impact on human health

NASA has published an integrated paper detailing the results of its Twins Study, which involved now-retired astronauts and identical twin brothers Scott and Mark Kelly. NASA called the findings “interesting, surprising and reassuring,” detailing the changes in Kelly’s body caused by his nearly year-long time on the International Space Station. The Twins Study took place from 2015 to 2016 and …