Without the usage of something other than chemical rockets, there will be no meaningful human space flight.
Every space agency should temporarily abandon manned space programs and pour the money they would have spent into propulsion research.
Yep - I have 8 pigs, and their pen is 3 panels by 5 panels. A panel is 8', so that's 24'x32', or 768 sq.ft. 96 square feet per pig.
Your dad's hard physical labor probably had the opposite effect on his youthful appearance than you think it had. He probably stayed looking young not despite, but because of the labor. I (and other people that I have spoken to) find that people who do physical labor for a living stay looking younger than people that do "desk" work. After all, exercise is generally considered the closest thing to a fountain of youth that we have yet found.
Space is to place as eternity is to time. -- Joseph Joubert