Completely worth sharing…
![Space, the ever elusive frontier... xkcd 893 65 years after we first walk on the moon...](http://imgs.xkcd.com/comics/65_years.png)
The universe is probably littered with the one-planet graves of cultures which made the sensible economic decision that there's no good reason to go into space--each discovered, studied, and remembered by the ones who made the irrational decision.