via.kdvr.com
NASA twins study explores space, the final genetic frontier
WASHINGTON — From his eyes to his immune system, astronaut Scott Kelly's body sometimes reacted strangely to nearly a year in orbit, at least compared to his Earth-bound identical twin — but newly published research shows nothing that would cancel even longer space treks, like to Mars. The good news: Kelly largely bounced back after returning home, say scientists who released final results from NASA's "twins study," a never-before opportunity to track the biological consequences of spaceflight in genetic doubles.