Writers of contemporary fiction are often novelists only; writers of heroic fantasy, a genre that increasingly overlaps with science fiction, tend to write very long novels only. Science fiction is different; the short story has been important for most of its practitioners, though it sets taxing formal problems when the writer has to cram the details of an alternative or future world into a short compass. The first of the stories in this big anthology of Australian science fiction was published in 1955, the most recent in 2001, so it offers a good sense of the path the genre has traced.