“Mark and Scott Kelly are still identical twins,” NASA Johnson Space Center News Chief Kelly O. Humphries says in an email to reporters.
What researchers did observe are changes in gene expression, which is how your body reacts to your environment.
On March 8, Business Insider published a story about preliminary findings from NASA’s ongoing Twins Study, published in a press release from January.
“Another interesting finding concerned what some call the ‘space gene,’ which was alluded to in 2017,” NASA writes.
However, the remaining 7 percent point to possible longer-term changes in genes related to his immune system, DNA repair, bone formation networks, hypoxia, and hypercapnia.”.
The next day, Newsweek published a story about the same results with the headline “NASA Twins Study Confirms Astronaut’s DNA Actually Changed in Space.”
The way Kelly’s DNA is expressed changed after he spent an extended period of time in space, but that does not mean his DNA changed. »