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
As soon as you trust yourself, you will know how to live...ALF wouldn't eat Lucky...The rise or fall of wages is common to all states...We must show there is good in society...When anger rises, think of the consequences...Wonder is the feeling of the philosopher...
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