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
It is virtually impossible to compete...A well adjusted person is one who makes the same...I have never met a person in whom I did not see...We do not need to be heroes to save the world...The mountains are calling and I must go...You choose to be happy, and in life we have...
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