When we do things that are really hard, we can achieve great things - and that has worked as a great model for me. Scott Kelly achievegreathard Change image and share on social
People do really well on space missions, but it's the physiological, the medical stuff, the stuff like radiation, loss of bone mass and muscle mass and density. It's those things that we need to figure out. Scott Kelly bonedensityfigure share on social
I believe in exploration, and I will miss being on the front lines of that endeavor. On one hand, I look forward to going home, but it's something that's been a big part of my life, and I'm going to miss it. Scott Kelly bigendeavorexploration share on social
On this flight, my fourth spaceflight, I also became the record holder for total days in space and single longest mission. Scott Kelly dayflightfourth Change image and share on social
I've flown in space four times now, so it's going to be hard in that respect, but I certainly look forward to going back to Earth. I've been up here for a really long time and sometimes, when I think about it, I feel like I've lived my whole life up here. Scott Kelly backearthfeel share on social
The workouts have positively impacted the astronauts' bones and muscles, and they are coming back in really good shape. But some are losing bone and muscle but not as much as we saw in the early days. Scott Kelly astronautbackbone Change image and share on social
We've got to get rid of the stuff on the space station somehow. So we do have a pretty significant capability to bring back stuff on SpaceX that you might not imagine. Scott Kelly backbringcapability Change image and share on social
The majority of astronauts have to change their eyeglasses while in space. They bring eyeglasses with them and typically change a few months into the mission. Scott Kelly astronautbringchange Change image and share on social
I feel more like an environmentalist since I've been up here. There are parts of the Earth that are covered with pollution all the time. I saw weather that was unexpected. Storms bigger than we've seen in the past. This is a human effect. This is not a natural phenomenon. Scott Kelly bigcoverearth share on social
Just like the bones and muscles, the heart is designed to work in one gravity here on Earth, so when you put the heart in space, it operates differently and changes shape. Scott Kelly bonedesigndifferently Change image and share on social