In Lonely Planets, astronomer David Grinspoon is buoyantly optimistic about the possibility that we are not alone in the universe. Grinspoon, who serves as principal scientist in the Department of Space Studies at the Southwest Research Institute, lays out a detailed but not boring case for life on other planets, dropping authoritative quotes and goofy footnotes in equal measure. The Grinspoon family hung out with Carl Sagan and other astronomical royalty, giving young David an early appreciation for SETI and the heady astrobiological theorizing of the 1970s. In the 21st century, scientists are still split on the question of extraterrestrial life. Grinspoon believes that a "natural philosophy" approach is the key to furthering our knowledge in this field, since there is precious little evidence with which to apply the scientific method. Instead of looking for the familiar and testable, he writes, we should expect the unexpected.

Expecting to find DNA elsewhere is like expecting a Star Trek universe with humanoid aliens who speak English and insist that we join them for dinner at eight.

Lonely Planets is a substantial book, covering the origins of life on Earth as well as the changes in religious and social thought that have affected astronomers' search for other planets and their theoretical inhabitants. Grinspoon's style is exuberant, even a little cocky, and the result is delightful readability. Lonely Planets lets readers share the dismay of finding out there are probably no Martians and the thrill of wondering if there might be Europans. "I think our galaxy is full of species," writes Grinspoon. "The wise ones are out there waiting for us to join them." --Therese Littleton

From Publishers Weekly
Principal scientist at the Southwest Research Institute's department of space science, Grinspoon offers an up-to-date picture of the search for extraterrestrial life and the prospects of finding it in a universe that we now know contains other solar systems. It also covers the nearly four centuries that the search has been under way since the initial observations of Renaissance astronomers. As soon as biology joined the inquiring minds, theories multiplied thick and fast; the historiography of the scientific debate is complex and has the potential for being unbearably dull. But Grinspoon handles the wide variety of material necessary for a coherent narrative with great aplomb, marshalling material such as the charming Conversations, a 17th-century dialogue by a French astronomer in which a philosopher and a marquise debate astronomical topics. Even when he turns to physics, the author runs to phrases like "the Sun in its wild youth" to describe the energy output of various kinds of stars, making this book less a popularization than a personable chat on life, the universe and everything. Copyright 2003 Reed Business Information, Inc.

From Scientific American
As he tells engagingly the story of humankind's long fascination with the possibility of extraterrestrial life, Grinspoon ponders the impact of a first contact in the form of a radio message from an intelligent civilization. "It might be frightening, liberating, uplifting, disturbing, or all of the above, but I say, 'Bring it on.'" And what if the first form of extraterrestrial life to be discovered turns out to be microbes? It "would enlarge our kingdom." Grinspoon, principal scientist in the department of space studies at the Southwest Research Institute and adjunct professor of astrophysical and planetary sciences at the University of Colorado at Boulder, concludes with his own belief: "I think our galaxy is full of species who have crawled up from the slime of their home worlds, evolved self-awareness and started to tinker, passed beyond the threat of technological self-extermination, and transcended their animal origins to move out into the cosmos."

Editors of Scientific American

From Booklist
Astronomer and space advocate Grinspoon pulls lots of facts, hypotheses, and beliefs together in this entertaining consideration of the likelihood of encountering extraterrestrial life. Nevertheless, the book is orderly, as well, starting with the astronomical and social history that enabled reasonably learned minds to hypothesize about other worlds and the possibility of life on them, and continuing with what has been learned during the past four decades about the solar system and what lies beyond it. Grinspoon describes the intricate, four-centuries-old dance of astronomy and biology, and concludes by discussing where theories may take us when the limits of current data have been reached. He seasons the discussion with witty anecdotes, personal experiences (relevant, since he has worked with NASA since he was a student), and reminders of what has been demonstrated and what is still theoretical. Fun to read, Grinspoon comes across like a buddy in a bar, trying out ideas over a beer or few. He deserves a large readership. Frieda Murray
Copyright © American Library Association. All rights reserved

San Diego Union-Tribune
"[A] terrific book."

FROM THE PUBLISHER

It's been nearly four decades since Carl Sagan first addressed the general public from a scientist's perspective, confronting the possibility of extraterrestrial life. We've learned a lot in those years, and planetary scientist David Grinspoon is well prepared to explore this field with a new generation of readers. In Lonely Planets, Grinspoon investigates the big questions: How widespread are life and intelligence in the cosmos? Is life on Earth an accident or in some sense the "purpose" of this universe? And how can we, working from the Earth-centric definition of "life," even begin to think about the varieties of lifeforms on other planets?

FROM THE CRITICS

Entertainment Weekly

It's one thing to write a critical examination of the flawed thinking that has shaped the way science considers the possibility of extraterrestrial life; it's quite another to write one that actually begins "It was a dark and stormy night..." Such is the arched-brow humor favored by this astrobiologist and NASA adviser, who drops quotes from academic stalwarts like Madonna, R.E.M., and The Onion. Yet, in his low-key, conversational language, Grinspoon asks provocative questions about modern science's unyielding rigidities; gives an informed, dispassionate consideration of the UFO phenomenon; and suggests that NASA might be a tad too preoccupied with Mars. Definitive proof that life on this planet is intelligent and funny.

Publishers Weekly

Principal scientist at the Southwest Research Institute's department of space science, Grinspoon offers an up-to-date picture of the search for extraterrestrial life and the prospects of finding it in a universe that we now know contains other solar systems. It also covers the nearly four centuries that the search has been under way since the initial observations of Renaissance astronomers. As soon as biology joined the inquiring minds, theories multiplied thick and fast; the historiography of the scientific debate is complex and has the potential for being unbearably dull. But Grinspoon handles the wide variety of material necessary for a coherent narrative with great aplomb, marshalling material such as the charming Conversations, a 17th-century dialogue by a French astronomer in which a philosopher and a marquise debate astronomical topics. Even when he turns to physics, the author runs to phrases like "the Sun in its wild youth" to describe the energy output of various kinds of stars, making this book less a popularization than a personable chat on life, the universe and everything. (Nov.) Copyright 2003 Reed Business Information.

Kirkus Reviews