>There has been no comparable advance in space flight technology in the last 58 years. Because there was no incentive. Space was something governments did and

>There has been no comparable advance in space flight technology in the last 58 years. Because there was no incentive. Space was something governments did and after the USA won the space race, interest waned. SpaceX proved there is a commercial market. Now we are witnessing the start of a commercial space boom. https://en.wikipedia.org/wiki/List_of_private_spaceflight_companies#Launch_vehicle_makers https://en.wikipedia.org/wiki/List_of_private_spaceflight_co... Look at the number of launchers in development. Competition = innovation. And once space mining has been proven as a concept, then the real boom will begin. I'm optimistic and expect all of this to happen in the next 20 years. >What is this new propulsion technology that you anticipate? Ion drives?, scramjets?, something that hasn't been discovered yet?, ... I honestly don't know but I doubt we will still be stuck with chemical rockets a 100 years from now.