“It has often been said that, if the human species fails to make a go of it here on the Earth, some other species will take over the running. In the sense of developing intelligence this is not correct. We have or soon will have, exhausted the necessary physical prerequisites so far as this planet is concerned. With coal gone, oil gone, high-grade metallic ores gone, no species however competent can make the long climb from primitive conditions to high-level technology. This is a one-shot affair. If we fail, this planetary system fails so far as intelligence is concerned.”

Quoted in "The Olduvai Theory: Sliding Towards a Post-Industrial Stone Age" by Richard C. Duncan http://dieoff.org/page125.htm <br class="br">Originally from Fred Hoyle, Of Men and Galaxies (Seattle: University of Washington Press, 1964).

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Fred Hoyle19

British astronomer 1915–2001

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