"We are interested in the possibility of life on other planets. To think about this, we look first at why there is life on our planet and if there was life on our neighbors. The author examines various extreme conditions that support life on our planet and speculates about the types of life on other planets. This may encourage young readers to pursue careers that will search for life in space. Photographs and illustrations support the text. At the end of the book are a Timeline Of Planet Discoveries, a Glossary, Find Out More and an Index. This would be a good addition to any Library. -Barbara Simpson, Hartman School Omaha Public Schools February 2013"