Space travel sounds epic, but did you know it can actually speed up aging? A new study found that astronauts’ stem cells age faster in space, making it harder for their bodies to repair themselves. After months on the ISS, some astronauts came back looking way older, with thinner faces and even greyer hair! Microgravity and cosmic radiation mess with your cells, causing DNA damage and even ‘chicken legs.’ The good news? Some effects reverse back on Earth, but space is definitely the ultimate stress test for the human body. #Science #SpaceTravel #Aging