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
If Hitler invaded hell I would make at least...When about to commit a base deed, respect thyself...To succeed in life, you need three things...A lie can travel half way around the world...I can control my destiny, but not my fate...The condition of man... is a condition of war...
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