After a record stay in space, astronaut Scott Kelly grew 1.5 inches due to a lack of gravity. He faces a greater risk of cancer than most earth-bound folks due to radiation exposure that’s 20 times higher in space. His bones are less dense than they used to be, and his heart is likely smaller.
“It felt like I had been up there my whole life, you know, after about the first six months,” Kelly said in a NASA video following his March 1 return from the International Space Station. “I’m definitely encouraged on our ability to go even longer.”
