[Of] all the writers of science fiction who have dealt with [the] meeting of the past and the future, it is Ray Bradbury whose treatment has been the deepest and most sophisticated. What has made Bradbury's handling of this theme distinctive is that his attitudes and interpretations have changed as he came to discover the complexities and the ambiguities inherent in it. (p. 175)

Bradbury's point [in The Martian Chronicles] here is clear: [the Earthmen] met their deaths because of their inability to forget, or at least resist, the past. Thus, the story of this Third Expedition acts as a metaphor for the book as a whole. Again and again the Earthmen make the fatal mistake of trying to recreate an Earth-like past rather than accept the fact that this is Mars—a different, unique new land in which they must be ready to make personal adjustments. Hauling Oregon...