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Astronaut Scott Kelly's DNA got altered after spending a year in space
If there is any end to the revelation of the mysteries that the universe has to offer us, we sure aren't even at the start of it. The enigmas of space thrown at us by the likes of Einstein and Hawking like the grandfather paradox, the cloverfield paradox, wormholes and the distortion of space-time are sure to take anyone by surprise. However, this latest revelation will even surprise biologists.

Mark and Scott Kelly are identical twin brothers, to say the least, they were identical until Scott got the opportunity to spend a year in space. 

According to preliminary findings from the NASA researchers, upon his return from the International Space Station (ISS) after spending 340 days there, Scott had grown 2 inches taller, his body mass had decreased, his gut bacteria were completely different and even his genetic coding had changed significantly. This happened two years ago but what is even more bewildering is that he has shrunk back to his original height now.

A recent NASA statement suggests that the mental and the physical stresses of Scott's year in space might be responsible for activating numerous "space genes" that changed his immune system, eyesight, bone formation and various other bodily processes. It is clear that most of the changes that the astronaut went through have reversed following his return to planet Earth, however, 7 per cent of Scott's genetic code remains altered and it might as well stay the same permanently.

The changes are "thought to be from the stresses of space travel, which can cause changes in a cell's biological pathways," read the NASA statement.

"Such actions can trigger the assembly of new molecules, like a fat or protein, cellular degradation, and can turn genes on and off, which change cellular function," the statement further adds.

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