So without that Canadian invention we were grounded,

When I was nine, I wanted to be an astronaut but at that time there weren't any Canadian astronauts. You had to be American or Soviet. So many things will be possible in your lifetimes.

The International Space Station is a phenomenal laboratory, an unparalleled test bed for new invention and discovery. Yet I often thought, while silently gazing out the window at Earth, that the actual legacy of humanity's attempts to step into space will be a better understanding of our current planet and how to take care of it.

When you're on one of the Caribbean islands, sometimes it's hard to picture how they fit in with the rest, but when you see them all joined together like a necklace from space, you see the natural geographic connectedness of them all.

I've been so lucky to have done two spacewalks. If you looked at your wristwatch, I was outside about 15 hours, which is about 10 times around the world. And, you know, there's a whole time dilation, distortion thing.

Cynicism is the easiest of all reactions, right? But it's also so disappointing and self-defeating.