"Astonishing...mind-expanding...universe-expanding."
         -- Los Angeles Times

"Compelling...evocative...Morton's prose is like Earth: humid, rich, swirling, alive...worthwhile for any reader interested in astronomy and space exploration."
         -- The Boston Globe

"There is much to recommend in this book. The author has an encyclopedic grasp of the development of major discoveries of Mars science, and he summarizes them in a very understandable way.... And, I must confess, I am frankly envious of his engaging prose. This book will delight anyone interested in the exploration of the planet next door."
         -- American Scientist

"Morton captures the revolutions in thought that come from envisioning another world and comparing it with our own."
         -- The Dallas Morning News