"I think my career will end too early for me to go to Mars, though I might be involved in preparing the next generation to go. I'd love to explore Mars, but, ultimately, it's kind of a crappy planet. The thing is, Mars One people would never go outside without a spacesuit ever again. You're going to live in a tin can. Space stations are noisy; it's like living inside a computer with the fan on all the time. You're never going to smell grass or trees. It's just never going to be anything like Earth. You're never going to swim. You're giving up so much."