"What If—" is a fantasy short story by American writer Isaac Asimov, first published in the Summer 1952 issue of Fantastic and reprinted in the 1969 collection Nightfall and Other Stories. The story was inspired by the author's wife who, during a car journey they were taking from New York to Boston, asked him where he got his story ideas. Before they arrived, Isaac had thought of a plot based on the journey. Source: Wikipedia (en)