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
A state of society where men may not speak...Thanksgiving dinners take eighteen hours to prepare...Only I can change my life...The earth is the mother of all people...In my house, the Rose Parade and the Rose Bowl Game...I find the roller-coaster ride of auditioning...