Guest:  Dr. Robert (Bob) Zubrin;  Topics:  Searching for life on Mars, sample returns, planetary protection nuclear energy, student design contests, Mars Society programs and upcoming convention, gravity prescription determination, human spaceflight, NASA, Starship, SpaceX and much more.

Guest:  Dr. Ajay Kothari;  Topics:  Thorium energy and reactors, details, advantages and some of the politics involved in using thorium to solve our energy problems.

Guest:  Stephanie Thomas;  Topics:  Princeton Satellite Systems fusion development program, R&D plus fusion fuels, R&D, the fusion industry overview, fusion reactor performance specs and timelines, funding fusion and much more.

Guest:  John Strickland;  Topics:  John's two new book, "Developing Space" and "Settling Space," space policy, sources of energy and power, challenges, policies and human spaceflight, Mars, the Moon, NASA, commercial space, reusability and more.

Guest:  John Mankins;  Topics: John's project with the US and Australia, space solar power technology, costs, regulatory concerns, national and international support, technology advancements, launch advancements, economic breakeven and much more.