"Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying."
— Arthur C. Clarke

January 1, 1970

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Added on April 10, 2026
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Novelists from EnglandEssayists from EnglandInventorsAcademics from the United KingdomShort story writers from England
Original Language: English

Sources

As quoted in Visions : How Science Will Revolutionize the Twenty-First Century (1999) by Michio Kaku, p. 295