Books and idea's are friggin awesome, I have read so many it is hard to keep track. I have to ask though why we as a species have not been planning how we are going to get the heck out of our solar system ? Whether we are hit by space debris or the sun just runs out why oh why are we not concentrated on how we as a species can continue to live ? Yeah it could be billions of years before the sun burns out or next week that another asteroid hits our planet. It is just, I dunno, stupid? Humans if we do not figure out a way to get beyond our sun are already doomed. Generational ship, warp speed, wormhole travel, we are going to need something to continue on. Yeah I am just blabbing on about the obvious but man, we have to do something. Sorry for the rant, we need to do something now, not later.