British mathematician, physicist and writer (1935–2002)
Charles Sheffield (25 June 1935 – 2 November 2002) was an English-born mathematician, physicist and science fiction writer who served as a President of the Science Fiction and Fantasy Writers of America and of the American Astronautical Society.
From: Wikiquote (CC BY-SA 4.0)
Alternative Names:
Charles A. Sheffield
•
James Kirkwood
From Wikidata (CC0)
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Where orbits are wildly varying, life has no chance to develop. Changes are too extreme. Temperatures melt tin, then solidify nitrogen. If it is once established, life is persistent; it can adapt to many extremes. But there is a fragility in the original creation that calls for a long period of tightly-controlled variations.