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
The glory of gardening: hands in the dirt...A black cat crossing your path signifies...If our nation is to rebuild opportunity for future...When I have bad days, I just eat lots of chocolate...The secret of a happy marriage remains a secret...Treat all men alike. Give them the same law...