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
Heaven has no rage like love to hatred turned...The funniest memory that I can recall...Immense power is acquired by assuring yourself...I think one of the terrible things today is...A business that makes nothing but money...Breathless, we flung us on a windy hill...
