In the wake of a flood of new data and images from several exploratory missions, fascination with Mars has become even more intense than it was when Percival Lowell believed he had observed canals constructed by live Martians. While we know that these never existed, we do have evidence that Mars once had rivers, shallow lakes, glaciers, huge active volcanoes, and intense flooding. In this book Peter Cattermole, a geologist who has been studying the...