"Green Mars" is a science fiction novella by the American writer Kim Stanley Robinson, first published in Asimov's Science Fiction in September 1985, eight years before his novel of the same name.The author later said that he wrote the story "mainly to stake a claim – at least a moral claim – on the name. I thought Green Mars was such a good name, such an obvious name." The story describes an expedition climbing Olympus Mons on Mars. It is set in a different fictional universe from that of the novel—it has characters which also appear in the author's short works "Exploring Fossil Canyon" (1982) and "A Martian Romance" (1999).At the time the story was written, the most recent missions to Mars were Viking 1 and Viking 2 which reached the planet in the summer of 1976. Source: Wikipedia (en)