Nolan, Kevin. MARS A Cosmic Stepping Stone Uncovering Humanity's Cosmic Context / [electronic resource] : by Kevin Nolan. - New York, NY : Praxis Publishing, Ltd, 2008. - xxii, 379 p. : ill., digital ; 24 cm. ISBN: 9780387499819 (electronic bk.) 9780387341644 (paper) Subjects--Topical Terms: Life on other planets. Dewey Class. No.: 576