Guest: Dr. Robert (Bob) Richards. Topics: Moon Express, Singularity University, ISU, commercial space development. Please note that you are invited to comment, ask questions, and rate this program on the new Space Show blog, http://thespaceshow.wordpress.com. We welcomed Dr. Bob Richards back to the program. As we started our first segment, I asked Dr. Richards about his work & exchange of ideas with Dr. Carl Sagan. Bob not only told us about working with Carl, but also with Arthur C. Clark & Gerard. K. O'Neill. We next talked to Dr.