Health
What a year in space does to your genes
HERE’S THE INTERESTING PART
Going to Mars sounds cool until you realize microgravity fundamentally rewrites your biology. NASA’s Twin Study found that a year in space altered the gene expression of astronaut Scott Kelly. While most changes reverted on Earth, a stubborn percentage of his DNA remained permanently switched on or off, thanks to the horrific stress of cosmic radiation.
One discovery leads to another.
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