Danh ngôn của Larry Niven (Sứ mệnh: 3)

Building one space station for everyone was and is insane: we should have built a dozen.
I'd visit the near future, close enough that someone might want to talk to Larry Niven and can figure out the language; distant enough to get me decent medical techniques and a ticket to the Moon.
The dinosaurs became extinct because they didn't have a space program.