The Search for Life on Mars (Helix Books)

Who's afraid of little green men these days? We've got more pressing (and realistic) worries now, but recent evidence points to the red planet as a possible source of living matter, so while we might not have to worry about the war of the worlds, it does behoove us to be neighborly and check it out. Astrobiologist Malcolm Walter wrote The Search for Life on Mars to explain what we know and what's at stake in this interplanetary reconnaissance mission. His writing is relaxed and personal; he shares his early experiences observing the space program with the readers and builds in us a sense of the magic felt by the pioneers in extraterrestrial exploration. He goes on to describe our current state of knowledge--and ignorance--about life elsewhere and on Mars in particular, then explains what we're currently doing to investigate and why.

The fabled "Martian meteorite" renewed interest in both Mars and the search for alien life, and Walters tells us its history and probable origin, though much still remains unknown. The excitement of working with NASA comes through in his writing about his own work; it's fascinating to read of space research divorced from the old context of nationalistic pride. Walters ends the book with a beautiful, lucid description of what the first Martian explorers will see, and argues gently for the importance and relevance of this work to our lives and those of our descendents. --Rob Lightner