Dr. Barrett Caldwell is a professor of Industrial Engineering with a courtesy appointment in Aeronautics at Purdue University (which has graduated more astronauts than any other public university in the country). He directs the Indiana Space Grant Consortium, and has worked on human factors engineering with NASA. We talk about how the humanities affect our ability to travel in space, some of the practical barriers, and he has a great answer to the question "What is it about West Lafayette that makes people want to leave the planet?"