Neil deGrasse Tyson
Perhaps we've never been visited by aliens because they have looked upon Earth and decided there's no sign of intelligent life.
More quotes and aphorisms
Every good business story has a conflict and triumph...If you aren't going all the way, why go at all?...I cannot think of any need in childhood...When the cat's away...I have this really high priority on happiness...The only limit to your impact is your imagination...