I was watching his show on the Discovery Channel and it got me thinking. How the hell does he know what he's talking about? Does he hold the knowledge of efficient interplanetary travel?? Lol.
IMO finding a more efficient source of propulsion is the biggest hurdle when it comes to sending large immigration fleets into space. Someone needs to make SK's Thermal Nuclear Engine or Star Wars' repulsor lift technology a reality. Lol
I personally don't give a damn about what happens to Earth after I die. lol