I was intrigued by the idea that Roger Launius brought up about feasible ways to get humans to Mars, when he mentioned the idea of the multigenerational space shuttle.  He posed many questions about this, such as whether or not the people on the space shuttle would know what they were supposed to do when they got to Mars one thousand years in the future, and whether they would even want to leave the space shuttle.  This left me with many more questions.  One of them was that if these people did generationally “forget” what they were supposed to do and why they were there, would they find themselves in a similar state to the one we are in now, where we are realizing that our resources that once seemed infinite are suddenly finite?  Would they send missions to Earth, trying to find a place with more resources where they could live?  This is quite a concept.  Additionally, if this multigenerational space shuttle were to serve as a microlab of humanity, would their language develop and change?  Would they develop a unique religion?  What sorts of social structures would develop and change in this microlab?  This was one of the most thought-provoking lectures in the series.