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
Everyone has his own specific vocation or mission in life...Thank you for the confidence put in my...Parents do not have the courage to say no...You become so obsessed, and that's not a bad thing...Movies can and do have tremendous influence...Cinderella story...
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