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
'Through sickness and through health'...All the money in the world can't buy you back...In all things of nature...'Tis better to have loved and lost...Believe in yourself, and the rest will fall into place...The development of weapons of mass destruction...
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