> Whether we like it or not, whatever we do, whatever we've build, good or evil, will vanish sooner or later. The human beings will extinct, the earth will become quite, the sun will extinguish. It's just matter of time. If nothing we do could make any sense in the long term, how can we consider something useful not?

Barring a humanity-friendly intelligence explosion event, of course. (I'll leave the Googling to you.)