NASA Astronaut Scott Kelly Is Not a 'Space Mutant' After All

March 22, 2018

Remember that story about the twin brothers who had different DNA after one of them spent a year in space? One of the scientists for the NASA Twins Study says reports of Scott Kelly's DNA being changed are not quite accurate. Colorado State University professor Susan M. Bailey, told, "If seven percent of his genes changed, not only would he not be a twin, he wouldn't be a human!" Bailey says the differences they observed in Scott's body were actually much more subtle.