“Interviewer at astronaut interview: Dr. O’Leary, would you submit to a hazardous two-year journey to Mars?O’Leary: Whew. A two-year trip to Mars. I must admit that I haven’t given it much thought. Are you serious?Interviewer: Sure we’re serious. You’re twenty-seven years old, you could be an astronaut for twenty years and within twenty years we could be sending men to Mars. And Mars is your field of specialty, isn’t it, Dr. O’Leary?”