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"In a world that is in chaos politically, socially and environmentally, how can the human race sustain another 100 years?"

— Stephen Hawking

January 1, 1970

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Added on April 10, 2026

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Children's authors University of Cambridge faculty Science authors Science fiction authors from England Physicists from England

Original Language: English

Sources

Open question, posted to the Internet, as quoted in The Guardian, and "Watching the World" in Awake! magazine (June 2007); a month after posting the question he explained: I don’t know the answer. That is why I asked the question, to get people to think about it, and to be aware of the dangers we now face.

https://en.wikiquote.org/wiki/Stephen_Hawking

Open question, posted to the Internet, as quoted in The Guardian, and "Watching the World" in Awake! magazine (June 2007); a month after posting the question he explained: I don’t know the answer. That is why I asked the question, to get people to think about it, and to be aware of the dangers we now face.