I like to think of ideas as potential energy. They're really wonderful, but nothing will happen until we risk putting them into action.

The really wonderful thing that happened to me when I was in space was this feeling of belonging to the entire universe.

My perspective is the Earth will be here. It just may not be habitable to our life form. We get confused. We think we're the center of everything.

I think that people need an adrenalin rush. Folks need something aspirational; they need to do something that is hard. That's what ignites the imagination.

The drills we do, where you're telling kids to memorize things, don't actually work. What works is engaging them and letting them do things and discover things.

One Hundred Year Starship really is about the idea that is we pursue an extraordinary tomorrow; we'll build a better world today.