Space travel is indeed a dangerous thing. The most breathtaking moments is when flying off of earth on a rocket. Even though you make a safe fight from earth still, a short stay in space can change one’s very DNA. A long-term NASA study has shown it in which they used Scott Kelly and his twin Brother Mark as research’s guinea pig to experiment what happens when a person stays for a long time in space.

Scott has spent more than 500 days in space, but a huge chunk of that comes with a tiny mission that had Scott stay on the international space station for 342 days. Mark, his brother and identical twin having some DNA is a retired astronaut and this gave the never done before experiment’s opportunity to NASA to test how does before time stay affects human body or even it affects it. And when the results come, they found out that it really does changes human. When Scott return, his DNA was conspicuously changed!

NASA explained, “ Scott’s telomeres, encamps of chromosomes that shorten as one age actually become significantly longer in space, while this finding was presented in 2017, the team verified this unexpected change with multiple assays and genomics testing. Additionally, a new finding that the majority of these telomeres shortened within two days of Scott’s return to Earth”

Although most of his genes got normal after some days return to earth but almost 7% of Scott’s genes have long-lasting changes, according to the researchers.

“I did read in the newspaper the other day that 7 percent of my DNA had changed permanently, and I’m reading that I’m like, huh, well that’s weird,” said Scott Kelly in a recent interview. Well, probably NASA is planning the world first manned Mars trip for 2030.

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