Half-Breeds on Venus

"Half-Breeds on Venus" is a science fiction short story by American writer Isaac Asimov. Asimov was asked by Frederik Pohl, editor of Astonishing Stories, to write a sequel to his earlier Tweenie story "Half-Breed", and he spent April and May 1940 doing so. He submitted the sequel to Pohl on June 3, and Pohl accepted it on the 14th, running it in the December 1940 issue of Astonishing. Asimov subsequently included the story in his 1972 collection The Early Asimov.

"Half-Breeds on Venus" was the twentieth story written by Asimov, the tenth to be published, the first sequel to an earlier story, and the first to "make the cover", i.e. to be the source of the magazine's cover illustration. At ten thousand words, it was also the longest story Asimov had had published up to that time. In commentary in The Early Asimov, Asimov says that the character of Irene was named after a fellow chemistry student at Columbia University whom he had developed a crush on.