NASA has released some interesting data about Scott Kelly and his year-long stint at the ISS. Although more data will be forthcoming, early statements seem to chalk one up for the good guys. A drastic change of environment seems to accelerate some evolutionary processes. Here is a quote from NASA
“the chemical modifications that were seen in Scott’s DNA during the trip in space returned to normal once he came back to Earth. The same thing happened around the midpoint of the study for Mark’s end, which led scientists to believe that genes are actually sensitive to changing environments.
NASA found that there are hundreds of unique genetic mutations for both Scott and Mark”.
Also stated were changes in sizes and shapes of red and white blood cells.
Imagining the implications here I thought this was pretty big.