I've read about laser systems for sending unmanned crafts at high speed: http://www.space.com/29950-lasers-power-tiny-interstellar-spacecraft.html http://www.sp

I've read about laser systems for sending unmanned crafts at high speed: http://www.space.com/29950-lasers-power-tiny-interstellar-spacecraft.html http://www.space.com/29950-lasers-power-tiny-interstellar-sp...