Iceworld
A high-school chemistry teacher is hired by a gang of interstellar narcotics smugglers to increase their profits. This drug comes from a bitterly cold and inhospitable planet, incapable of even being visited without massive life-support – Earth.
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Hal Clement
Hal Clement (1922–2003) was the pseudonym of the exemplar of hard science fiction, Harry C. Stubbs. He created the pseudonym while working for his Master's degree in Astronomy at Harvard, fearing his professor would not want him to be "wasting" his time. He did not know that this same professor submitted science fiction to Hugo Gernsback's magazines. Hal's first published story was "Proof" which appeared in the June 1942 issue of Astounding Science Fiction. Then, like many other sf writers, the War intervened.
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