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
One thing about television, it brings out personality...I feel honesty always works...If you don't like something, change it...Teach success before teaching responsibility...To write is to write is to write is to write is to write...Nature is ever at work building and pulling down...
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